diff --git a/.idea/misc.xml b/.idea/misc.xml
index cd18037..023f70c 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -2,6 +2,9 @@
 <project version="4">
   <component name="EntryPointsManager">
     <entry_points version="2.0" />
+    <list size="1">
+      <item index="0" class="java.lang.String" itemvalue="launcher.LauncherAPI" />
+    </list>
   </component>
   <component name="ProjectInspectionProfilesVisibleTreeState">
     <entry key="Project Default">
diff --git a/LaunchServer/resources/launchserver/defaults/config.cfg b/LaunchServer/resources/launchserver/defaults/config.cfg
index 42c1461..51f768a 100644
--- a/LaunchServer/resources/launchserver/defaults/config.cfg
+++ b/LaunchServer/resources/launchserver/defaults/config.cfg
@@ -10,7 +10,7 @@
 authHandler: "textFile";
 authHandlerConfig: {
 	file: "authHandler.cfg";
-	md5UUIDs: false;
+	md5UUIDs: true;
 };
 
 # Auth provider
diff --git a/LaunchServer/source/LaunchServer.java b/LaunchServer/source/LaunchServer.java
index c82f419..768fd75 100644
--- a/LaunchServer/source/LaunchServer.java
+++ b/LaunchServer/source/LaunchServer.java
@@ -114,19 +114,19 @@
 		// Setup
 		reloadKeyPair();
 		reloadConfig();
-		hashLauncherBinaries();
+		syncLauncherBinaries();
 
 		// Hash updates dir
 		if (!IOHelper.isDir(UPDATES_DIR)) {
 			Files.createDirectory(UPDATES_DIR);
 		}
-		hashUpdatesDir(null);
+		syncUpdatesDir(null);
 
 		// Hash profiles dir
 		if (!IOHelper.isDir(PROFILES_DIR)) {
 			Files.createDirectory(PROFILES_DIR);
 		}
-		hashProfilesDir();
+		syncProfilesDir();
 
 		// Set server socket thread
 		serverSocketHandler = new ServerSocketHandler(this);
@@ -193,25 +193,25 @@
 	}
 
 	@LauncherAPI
-	public void hashLauncherBinaries() throws IOException {
-		LogHelper.info("Hashing launcher binaries");
+	public void syncLauncherBinaries() throws IOException {
+		LogHelper.info("Syncing launcher binaries");
 
-		// Hash launcher binary
-		LogHelper.subInfo("Hashing launcher binary file");
-		if (!launcherBinary.hash()) {
+		// Syncing launcher binary
+		LogHelper.subInfo("Syncing launcher binary file");
+		if (!launcherBinary.sync()) {
 			LogHelper.subWarning("Missing launcher binary file");
 		}
 
-		// Hash launcher EXE binary
-		LogHelper.subInfo("Hashing launcher EXE binary file");
-		if (!launcherEXEBinary.hash()) {
+		// Syncing launcher EXE binary
+		LogHelper.subInfo("Syncing launcher EXE binary file");
+		if (!launcherEXEBinary.sync()) {
 			LogHelper.subWarning("Missing launcher EXE binary file");
 		}
 	}
 
 	@LauncherAPI
-	public void hashProfilesDir() throws IOException {
-		LogHelper.info("Hashing profiles dir");
+	public void syncProfilesDir() throws IOException {
+		LogHelper.info("Syncing profiles dir");
 		List<SignedObjectHolder<ClientProfile>> newProfies = new LinkedList<>();
 		IOHelper.walk(PROFILES_DIR, new ProfilesFileVisitor(newProfies), false);
 
@@ -221,8 +221,8 @@
 	}
 
 	@LauncherAPI
-	public void hashUpdatesDir(Collection<String> dirs) throws IOException {
-		LogHelper.info("Hashing updates dir");
+	public void syncUpdatesDir(Collection<String> dirs) throws IOException {
+		LogHelper.info("Syncing updates dir");
 		Map<String, SignedObjectHolder<HashedDir>> newUpdatesDirMap = new HashMap<>(16);
 		try (DirectoryStream<Path> dirStream = Files.newDirectoryStream(UPDATES_DIR)) {
 			for (Path updateDir : dirStream) {
@@ -247,7 +247,7 @@
 				}
 
 				// Hash and sign update dir
-				LogHelper.subInfo("Hashing '%s' update dir", name);
+				LogHelper.subInfo("Syncing '%s' update dir", name);
 				HashedDir updateHDir = new HashedDir(updateDir, null);
 				newUpdatesDirMap.put(name, new SignedObjectHolder<>(updateHDir, privateKey));
 			}
@@ -322,7 +322,7 @@
 		// Create new launcher EXE binary
 		LauncherBinary newExeBinary = newConfig.launch4J ?
 			new EXEL4JLauncherBinary(this) : new EXELauncherBinary(this);
-		newExeBinary.hash();
+		newExeBinary.sync();
 
 		// Apply changes
 		config = newConfig;
diff --git a/LaunchServer/source/binary/LauncherBinary.java b/LaunchServer/source/binary/LauncherBinary.java
index 0235982..0fa4555 100644
--- a/LaunchServer/source/binary/LauncherBinary.java
+++ b/LaunchServer/source/binary/LauncherBinary.java
@@ -33,7 +33,7 @@
 	}
 
 	@LauncherAPI
-	public final boolean hash() throws IOException {
+	public final boolean sync() throws IOException {
 		boolean exists = exists();
 		binary = exists ? new SignedBytesHolder(IOHelper.read(binaryFile), server.getPrivateKey()) : null;
 		return exists;
diff --git a/LaunchServer/source/command/basic/BuildCommand.java b/LaunchServer/source/command/basic/BuildCommand.java
index be15084..28f2e79 100644
--- a/LaunchServer/source/command/basic/BuildCommand.java
+++ b/LaunchServer/source/command/basic/BuildCommand.java
@@ -21,6 +21,6 @@
 	@Override
 	public void invoke(String... args) throws Exception {
 		server.buildLauncherBinaries();
-		server.hashLauncherBinaries();
+		server.syncLauncherBinaries();
 	}
 }
diff --git a/LaunchServer/source/command/handler/CommandHandler.java b/LaunchServer/source/command/handler/CommandHandler.java
index 0f31ebb..808fdc1 100644
--- a/LaunchServer/source/command/handler/CommandHandler.java
+++ b/LaunchServer/source/command/handler/CommandHandler.java
@@ -34,10 +34,10 @@
 import launchserver.command.basic.VersionCommand;
 import launchserver.command.hash.DownloadAssetCommand;
 import launchserver.command.hash.DownloadClientCommand;
-import launchserver.command.hash.HashBinariesCommand;
-import launchserver.command.hash.HashProfilesCommand;
-import launchserver.command.hash.HashUpdatesCommand;
 import launchserver.command.hash.IndexAssetCommand;
+import launchserver.command.hash.SyncBinariesCommand;
+import launchserver.command.hash.SyncProfilesCommand;
+import launchserver.command.hash.SyncUpdatesCommand;
 import launchserver.command.hash.UnindexAssetCommand;
 
 public abstract class CommandHandler implements Runnable {
@@ -57,14 +57,14 @@
 		register("clear", new ClearCommand(server));
 		register("gc", new GCCommand(server));
 
-		// Register hash commands
+		// Register sync commands
 		register("indexAsset", new IndexAssetCommand(server));
 		register("unindexAsset", new UnindexAssetCommand(server));
 		register("downloadAsset", new DownloadAssetCommand(server));
 		register("downloadClient", new DownloadClientCommand(server));
-		register("hashBinaries", new HashBinariesCommand(server));
-		register("hashUpdates", new HashUpdatesCommand(server));
-		register("hashProfiles", new HashProfilesCommand(server));
+		register("syncBinaries", new SyncBinariesCommand(server));
+		register("syncUpdates", new SyncUpdatesCommand(server));
+		register("syncProfiles", new SyncProfilesCommand(server));
 
 		// Register auth commands
 		register("auth", new AuthCommand(server));
diff --git a/LaunchServer/source/command/hash/DownloadAssetCommand.java b/LaunchServer/source/command/hash/DownloadAssetCommand.java
index 26ee5bb..1a463cc 100644
--- a/LaunchServer/source/command/hash/DownloadAssetCommand.java
+++ b/LaunchServer/source/command/hash/DownloadAssetCommand.java
@@ -47,7 +47,7 @@
 		unpack(new URL(String.format(ASSET_URL_MASK, version.name)), assetDir);
 
 		// Finished
-		server.hashUpdatesDir(Collections.singleton(dirName));
+		server.syncUpdatesDir(Collections.singleton(dirName));
 		LogHelper.subInfo("Asset successfully downloaded: '%s'", dirName);
 	}
 
diff --git a/LaunchServer/source/command/hash/DownloadClientCommand.java b/LaunchServer/source/command/hash/DownloadClientCommand.java
index b322906..2240d0a 100644
--- a/LaunchServer/source/command/hash/DownloadClientCommand.java
+++ b/LaunchServer/source/command/hash/DownloadClientCommand.java
@@ -64,8 +64,8 @@
 		}
 
 		// Finished
-		server.hashProfilesDir();
-		server.hashUpdatesDir(Collections.singleton(dirName));
+		server.syncProfilesDir();
+		server.syncUpdatesDir(Collections.singleton(dirName));
 		LogHelper.subInfo("Client successfully downloaded: '%s'", dirName);
 	}
 }
diff --git a/LaunchServer/source/command/hash/HashBinariesCommand.java b/LaunchServer/source/command/hash/HashBinariesCommand.java
deleted file mode 100644
index 186e7e0..0000000
--- a/LaunchServer/source/command/hash/HashBinariesCommand.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package launchserver.command.hash;
-
-import java.io.IOException;
-
-import launcher.helper.LogHelper;
-import launchserver.LaunchServer;
-import launchserver.command.Command;
-
-public final class HashBinariesCommand extends Command {
-	public HashBinariesCommand(LaunchServer server) {
-		super(server);
-	}
-
-	@Override
-	public String getArgsDescription() {
-		return null;
-	}
-
-	@Override
-	public String getUsageDescription() {
-		return "Rehash launcher binaries";
-	}
-
-	@Override
-	public void invoke(String... args) throws IOException {
-		server.hashLauncherBinaries();
-		LogHelper.subInfo("Binaries successfully rehashed");
-	}
-}
diff --git a/LaunchServer/source/command/hash/HashProfilesCommand.java b/LaunchServer/source/command/hash/HashProfilesCommand.java
deleted file mode 100644
index 011178c..0000000
--- a/LaunchServer/source/command/hash/HashProfilesCommand.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package launchserver.command.hash;
-
-import java.io.IOException;
-
-import launcher.helper.LogHelper;
-import launchserver.LaunchServer;
-import launchserver.command.Command;
-
-public final class HashProfilesCommand extends Command {
-	public HashProfilesCommand(LaunchServer server) {
-		super(server);
-	}
-
-	@Override
-	public String getArgsDescription() {
-		return null;
-	}
-
-	@Override
-	public String getUsageDescription() {
-		return "Rehash profiles dir";
-	}
-
-	@Override
-	public void invoke(String... args) throws IOException {
-		server.hashProfilesDir();
-		LogHelper.subInfo("Profiles successfully rehashed");
-	}
-}
diff --git a/LaunchServer/source/command/hash/HashUpdatesCommand.java b/LaunchServer/source/command/hash/HashUpdatesCommand.java
deleted file mode 100644
index 938cc77..0000000
--- a/LaunchServer/source/command/hash/HashUpdatesCommand.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package launchserver.command.hash;
-
-import java.io.IOException;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
-import launcher.helper.LogHelper;
-import launchserver.LaunchServer;
-import launchserver.command.Command;
-
-public final class HashUpdatesCommand extends Command {
-	public HashUpdatesCommand(LaunchServer server) {
-		super(server);
-	}
-
-	@Override
-	public String getArgsDescription() {
-		return "[subdirs...]";
-	}
-
-	@Override
-	public String getUsageDescription() {
-		return "Rehash updates dir";
-	}
-
-	@Override
-	public void invoke(String... args) throws IOException {
-		Set<String> dirs = null;
-		if (args.length > 0) { // Hash all updates dirs
-			dirs = new HashSet<>(args.length);
-			Collections.addAll(dirs, args);
-		}
-
-		// Hash updates dir
-		server.hashUpdatesDir(dirs);
-		LogHelper.subInfo("Updates dir successfully rehashed");
-	}
-}
diff --git a/LaunchServer/source/command/hash/IndexAssetCommand.java b/LaunchServer/source/command/hash/IndexAssetCommand.java
index b0bbced..79906e8 100644
--- a/LaunchServer/source/command/hash/IndexAssetCommand.java
+++ b/LaunchServer/source/command/hash/IndexAssetCommand.java
@@ -68,7 +68,7 @@
 		}
 
 		// Finished
-		server.hashUpdatesDir(Collections.singleton(outputAssetDirName));
+		server.syncUpdatesDir(Collections.singleton(outputAssetDirName));
 		LogHelper.subInfo("Asset successfully indexed: '%s'", inputAssetDirName);
 	}
 
diff --git a/LaunchServer/source/command/hash/SyncBinariesCommand.java b/LaunchServer/source/command/hash/SyncBinariesCommand.java
new file mode 100644
index 0000000..62c3089
--- /dev/null
+++ b/LaunchServer/source/command/hash/SyncBinariesCommand.java
@@ -0,0 +1,29 @@
+package launchserver.command.hash;
+
+import java.io.IOException;
+
+import launcher.helper.LogHelper;
+import launchserver.LaunchServer;
+import launchserver.command.Command;
+
+public final class SyncBinariesCommand extends Command {
+	public SyncBinariesCommand(LaunchServer server) {
+		super(server);
+	}
+
+	@Override
+	public String getArgsDescription() {
+		return null;
+	}
+
+	@Override
+	public String getUsageDescription() {
+		return "Resync launcher binaries";
+	}
+
+	@Override
+	public void invoke(String... args) throws IOException {
+		server.syncLauncherBinaries();
+		LogHelper.subInfo("Binaries successfully resynced");
+	}
+}
diff --git a/LaunchServer/source/command/hash/SyncProfilesCommand.java b/LaunchServer/source/command/hash/SyncProfilesCommand.java
new file mode 100644
index 0000000..25de620
--- /dev/null
+++ b/LaunchServer/source/command/hash/SyncProfilesCommand.java
@@ -0,0 +1,29 @@
+package launchserver.command.hash;
+
+import java.io.IOException;
+
+import launcher.helper.LogHelper;
+import launchserver.LaunchServer;
+import launchserver.command.Command;
+
+public final class SyncProfilesCommand extends Command {
+	public SyncProfilesCommand(LaunchServer server) {
+		super(server);
+	}
+
+	@Override
+	public String getArgsDescription() {
+		return null;
+	}
+
+	@Override
+	public String getUsageDescription() {
+		return "Resync profiles dir";
+	}
+
+	@Override
+	public void invoke(String... args) throws IOException {
+		server.syncProfilesDir();
+		LogHelper.subInfo("Profiles successfully resynced");
+	}
+}
diff --git a/LaunchServer/source/command/hash/SyncUpdatesCommand.java b/LaunchServer/source/command/hash/SyncUpdatesCommand.java
new file mode 100644
index 0000000..ff2ebdc
--- /dev/null
+++ b/LaunchServer/source/command/hash/SyncUpdatesCommand.java
@@ -0,0 +1,39 @@
+package launchserver.command.hash;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import launcher.helper.LogHelper;
+import launchserver.LaunchServer;
+import launchserver.command.Command;
+
+public final class SyncUpdatesCommand extends Command {
+	public SyncUpdatesCommand(LaunchServer server) {
+		super(server);
+	}
+
+	@Override
+	public String getArgsDescription() {
+		return "[subdirs...]";
+	}
+
+	@Override
+	public String getUsageDescription() {
+		return "Resync updates dir";
+	}
+
+	@Override
+	public void invoke(String... args) throws IOException {
+		Set<String> dirs = null;
+		if (args.length > 0) { // Hash all updates dirs
+			dirs = new HashSet<>(args.length);
+			Collections.addAll(dirs, args);
+		}
+
+		// Hash updates dir
+		server.syncUpdatesDir(dirs);
+		LogHelper.subInfo("Updates dir successfully resynced");
+	}
+}
diff --git a/LaunchServer/source/command/hash/UnindexAssetCommand.java b/LaunchServer/source/command/hash/UnindexAssetCommand.java
index d2ca90b..e49b74e 100644
--- a/LaunchServer/source/command/hash/UnindexAssetCommand.java
+++ b/LaunchServer/source/command/hash/UnindexAssetCommand.java
@@ -66,7 +66,7 @@
 		}
 
 		// Finished
-		server.hashUpdatesDir(Collections.singleton(outputAssetDirName));
+		server.syncUpdatesDir(Collections.singleton(outputAssetDirName));
 		LogHelper.subInfo("Asset successfully unindexed: '%s'", inputAssetDirName);
 	}
 }
diff --git a/LaunchServer/source/response/PingResponse.java b/LaunchServer/source/response/PingResponse.java
index 6fa5fba..1a35844 100644
--- a/LaunchServer/source/response/PingResponse.java
+++ b/LaunchServer/source/response/PingResponse.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 
+import launcher.request.PingRequest;
 import launcher.serialize.HInput;
 import launcher.serialize.HOutput;
 import launchserver.LaunchServer;
@@ -13,6 +14,6 @@
 
 	@Override
 	public void reply() throws IOException {
-		output.writeUnsignedByte(123);
+		output.writeUnsignedByte(PingRequest.EXPECTED_BYTE);
 	}
-}
\ No newline at end of file
+}
diff --git a/Launcher/runtime/dialog/overlay/debug/debug.fxml b/Launcher/runtime/dialog/overlay/debug/debug.fxml
index f03c5b8..29a93a1 100755
--- a/Launcher/runtime/dialog/overlay/debug/debug.fxml
+++ b/Launcher/runtime/dialog/overlay/debug/debug.fxml
@@ -5,13 +5,13 @@
 <?import javafx.scene.control.TextArea?>
 <?import javafx.scene.layout.Pane?>
 
-<Pane xmlns:fx="http://javafx.com/fxml/1" fx:id="overlay" prefWidth="580.0" prefHeight="350.0">
+<Pane xmlns:fx="http://javafx.com/fxml/1" fx:id="overlay" prefWidth="580.0" prefHeight="380.0">
 	<stylesheets>
 		<URL value="@debug.css" />
 	</stylesheets>
 	
 	<!-- Debug controls -->
-	<TextArea fx:id="output" layoutX="5.0" layoutY="5.0" prefWidth="570.0" prefHeight="340.0" />
-	<Button fx:id="copy" layoutX="365.0" layoutY="310.0" prefWidth="100.0" prefHeight="30.0" text="Копировать" defaultButton="true" />
-	<Button fx:id="action" layoutX="470.0" layoutY="310.0" prefWidth="100.0" prefHeight="30.0" />
+	<TextArea fx:id="output" layoutX="5.0" layoutY="5.0" prefWidth="570.0" prefHeight="370.0" />
+	<Button fx:id="copy" layoutX="365.0" layoutY="340.0" prefWidth="100.0" prefHeight="30.0" text="Копировать" defaultButton="true" />
+	<Button fx:id="action" layoutX="470.0" layoutY="340.0" prefWidth="100.0" prefHeight="30.0" />
 </Pane>
diff --git a/Launcher/runtime/dialog/overlay/debug/debug.js b/Launcher/runtime/dialog/overlay/debug/debug.js
index a117e39..a9d386d 100755
--- a/Launcher/runtime/dialog/overlay/debug/debug.js
+++ b/Launcher/runtime/dialog/overlay/debug/debug.js
@@ -72,16 +72,15 @@
 		var buffer = IOHelper.newCharBuffer();
 		var reader = IOHelper.newReader(process.getInputStream(),
 			java.nio.charset.Charset.defaultCharset());
+		var appendFunction = function(line)
+			javafx.application.Platform.runLater(function() debug.append(line));
 		for(var length = reader.read(buffer); length >= 0; length = reader.read(buffer)) {
-			task.updateMessage(new java.lang.String(buffer, 0, length));
+			appendFunction(new java.lang.String(buffer, 0, length));
 		}
 		
 		// So we wait for exit code
 		return process.waitFor();
 	});
-	task.messageProperty()["addListener(javafx.beans.value.ChangeListener)"](
-		function(o, ov, nv) debug.append(nv) // Anyone knows how to handle it better?
-	);
 	
 	// Set completion handlers
 	task.setOnFailed(function(event) {
diff --git a/Launcher/source/request/CustomRequest.java b/Launcher/source/request/CustomRequest.java
index 7840f96..d7a7391 100644
--- a/Launcher/source/request/CustomRequest.java
+++ b/Launcher/source/request/CustomRequest.java
@@ -1,10 +1,19 @@
 package launcher.request;
 
+import launcher.Launcher;
 import launcher.helper.VerifyHelper;
 import launcher.serialize.HInput;
 import launcher.serialize.HOutput;
 
 public abstract class CustomRequest<T> extends Request<T> {
+	public CustomRequest(Launcher.Config config) {
+		super(config);
+	}
+
+	public CustomRequest() {
+		this(null);
+	}
+
 	@Override
 	public final Type getType() {
 		return Type.CUSTOM;
diff --git a/Launcher/source/request/PingRequest.java b/Launcher/source/request/PingRequest.java
index e49473c..794d0bb 100644
--- a/Launcher/source/request/PingRequest.java
+++ b/Launcher/source/request/PingRequest.java
@@ -2,13 +2,22 @@
 
 import java.io.IOException;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.serialize.HInput;
 import launcher.serialize.HOutput;
 
 public final class PingRequest extends Request<Void> {
+	@LauncherAPI public static final byte EXPECTED_BYTE = 0b01010101;
+
+	@LauncherAPI
+	public PingRequest(Launcher.Config config) {
+		super(config);
+	}
+
 	@LauncherAPI
 	public PingRequest() {
+		this(null);
 	}
 
 	@Override
@@ -18,8 +27,8 @@
 
 	@Override
 	protected Void requestDo(HInput input, HOutput output) throws IOException {
-		int pong = input.readUnsignedByte();
-		if (pong != 123) {
+		byte pong = (byte) input.readUnsignedByte();
+		if (pong != EXPECTED_BYTE) {
 			throw new IOException("Illegal ping response: " + pong);
 		}
 		return null;
diff --git a/Launcher/source/request/Request.java b/Launcher/source/request/Request.java
index b7d63c9..e1b67dd 100644
--- a/Launcher/source/request/Request.java
+++ b/Launcher/source/request/Request.java
@@ -16,6 +16,17 @@
 
 public abstract class Request<R> {
 	private final AtomicBoolean started = new AtomicBoolean(false);
+	@LauncherAPI protected final Launcher.Config config;
+
+	@LauncherAPI
+	protected Request(Launcher.Config config) {
+		this.config = config == null ? Launcher.getConfig() : config;
+	}
+
+	@LauncherAPI
+	protected Request() {
+		this(null);
+	}
 
 	@LauncherAPI
 	public abstract Type getType();
@@ -29,8 +40,9 @@
 
 		// Make request to LaunchServer
 		try (Socket socket = IOHelper.newSocket()) {
-			socket.connect(IOHelper.resolve(Launcher.getConfig().address));
-			try (InputStream is = socket.getInputStream(); OutputStream os = socket.getOutputStream(); HInput input = new HInput(is); HOutput output = new HOutput(os)) {
+			socket.connect(IOHelper.resolve(config.address));
+			try (InputStream is = socket.getInputStream(); OutputStream os = socket.getOutputStream();
+				 HInput input = new HInput(is); HOutput output = new HOutput(os)) {
 				writeHandshake(input, output);
 
 				// Start request
@@ -52,11 +64,10 @@
 	@LauncherAPI
 	protected abstract R requestDo(HInput input, HOutput output) throws Exception;
 
-	private static void writeHandshake(HInput input, HOutput output) throws IOException {
+	private void writeHandshake(HInput input, HOutput output) throws IOException {
 		output.writeInt(Launcher.PROTOCOL_MAGIC);
 
 		// Write license & key info
-		Launcher.Config config = Launcher.getConfig();
 		output.writeBigInteger(config.publicKey.getModulus(), SecurityHelper.RSA_KEY_LENGTH + 1);
 		output.flush();
 
@@ -69,9 +80,9 @@
 	@LauncherAPI
 	public enum Type implements EnumSerializer.Itf {
 		PING(0), // Ping request
-		LAUNCHER(1), UPDATE(2), // Update requests
-		AUTH(3), JOIN_SERVER(4), CHECK_SERVER(5), // Auth requests
-		PROFILE_BY_USERNAME(6), PROFILE_BY_UUID(7), BATCH_PROFILE_BY_USERNAME(8), // Profile requests
+		LAUNCHER(1), UPDATE(2), UPDATE_LIST(3), // Update requests
+		AUTH(4), JOIN_SERVER(5), CHECK_SERVER(6), // Auth requests
+		PROFILE_BY_USERNAME(7), PROFILE_BY_UUID(8), BATCH_PROFILE_BY_USERNAME(0), // Profile requests
 		CUSTOM(255); // Custom requests
 		private static final EnumSerializer<Type> SERIALIZER = new EnumSerializer<>(Type.class);
 		private final int n;
diff --git a/Launcher/source/request/auth/AuthRequest.java b/Launcher/source/request/auth/AuthRequest.java
index f4a02c7..3fccd5c 100644
--- a/Launcher/source/request/auth/AuthRequest.java
+++ b/Launcher/source/request/auth/AuthRequest.java
@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.util.Arrays;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.client.PlayerProfile;
 import launcher.helper.IOHelper;
@@ -16,11 +17,17 @@
 	private final byte[] encryptedPassword;
 
 	@LauncherAPI
-	public AuthRequest(String login, byte[] encryptedPassword) {
+	public AuthRequest(Launcher.Config config, String login, byte[] encryptedPassword) {
+		super(config);
 		this.login = login;
 		this.encryptedPassword = Arrays.copyOf(encryptedPassword, encryptedPassword.length);
 	}
 
+	@LauncherAPI
+	public AuthRequest(String login, byte[] encryptedPassword) {
+		this(null, login, encryptedPassword);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.AUTH;
diff --git a/Launcher/source/request/auth/CheckServerRequest.java b/Launcher/source/request/auth/CheckServerRequest.java
index eb7eeaa..068ca37 100644
--- a/Launcher/source/request/auth/CheckServerRequest.java
+++ b/Launcher/source/request/auth/CheckServerRequest.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.client.PlayerProfile;
 import launcher.helper.VerifyHelper;
@@ -14,11 +15,17 @@
 	private final String serverID;
 
 	@LauncherAPI
-	public CheckServerRequest(String username, String serverID) {
+	public CheckServerRequest(Launcher.Config config, String username, String serverID) {
+		super(config);
 		this.username = VerifyHelper.verifyUsername(username);
 		this.serverID = JoinServerRequest.verifyServerID(serverID);
 	}
 
+	@LauncherAPI
+	public CheckServerRequest(String username, String serverID) {
+		this(null, username, serverID);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.CHECK_SERVER;
diff --git a/Launcher/source/request/auth/JoinServerRequest.java b/Launcher/source/request/auth/JoinServerRequest.java
index 283816e..7683c37 100644
--- a/Launcher/source/request/auth/JoinServerRequest.java
+++ b/Launcher/source/request/auth/JoinServerRequest.java
@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.util.regex.Pattern;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.helper.SecurityHelper;
 import launcher.helper.VerifyHelper;
@@ -19,12 +20,18 @@
 	private final String serverID;
 
 	@LauncherAPI
-	public JoinServerRequest(String username, String accessToken, String serverID) {
+	public JoinServerRequest(Launcher.Config config, String username, String accessToken, String serverID) {
+		super(config);
 		this.username = VerifyHelper.verifyUsername(username);
 		this.accessToken = SecurityHelper.verifyToken(accessToken);
 		this.serverID = verifyServerID(serverID);
 	}
 
+	@LauncherAPI
+	public JoinServerRequest(String username, String accessToken, String serverID) {
+		this(null, username, accessToken, serverID);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.JOIN_SERVER;
diff --git a/Launcher/source/request/update/LauncherRequest.java b/Launcher/source/request/update/LauncherRequest.java
index 3adc0eb..13a6def 100644
--- a/Launcher/source/request/update/LauncherRequest.java
+++ b/Launcher/source/request/update/LauncherRequest.java
@@ -23,7 +23,13 @@
 	@LauncherAPI public static final boolean EXE_BINARY = IOHelper.hasExtension(BINARY_PATH, "exe");
 
 	@LauncherAPI
+	public LauncherRequest(Launcher.Config config) {
+		super(config);
+	}
+
+	@LauncherAPI
 	public LauncherRequest() {
+		this(null);
 	}
 
 	@Override
@@ -39,7 +45,7 @@
 		readError(input);
 
 		// Verify launcher sign
-		RSAPublicKey publicKey = Launcher.getConfig().publicKey;
+		RSAPublicKey publicKey = config.publicKey;
 		byte[] sign = input.readByteArray(-SecurityHelper.RSA_KEY_LENGTH);
 		boolean shouldUpdate = !SecurityHelper.isValidSign(BINARY_PATH, sign, publicKey);
 
diff --git a/Launcher/source/request/update/UpdateListRequest.java b/Launcher/source/request/update/UpdateListRequest.java
new file mode 100644
index 0000000..0ecd44f
--- /dev/null
+++ b/Launcher/source/request/update/UpdateListRequest.java
@@ -0,0 +1,42 @@
+package launcher.request.update;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import launcher.Launcher;
+import launcher.LauncherAPI;
+import launcher.helper.IOHelper;
+import launcher.request.Request;
+import launcher.serialize.HInput;
+import launcher.serialize.HOutput;
+
+public final class UpdateListRequest extends Request<Set<String>> {
+	@LauncherAPI
+	public UpdateListRequest(Launcher.Config config) {
+		super(config);
+	}
+
+	@LauncherAPI
+	public UpdateListRequest() {
+		this(null);
+	}
+
+	@Override
+	public Type getType() {
+		return Type.UPDATE_LIST;
+	}
+
+	@Override
+	protected Set<String> requestDo(HInput input, HOutput output) throws IOException {
+		int count = input.readLength(0);
+		Set<String> result = new HashSet<>(count);
+		for (int i = 0; i < count; i++) {
+			result.add(IOHelper.verifyFileName(input.readString(255)));
+		}
+
+		// We're done. Make it unmodifiable and return
+		return Collections.unmodifiableSet(result);
+	}
+}
diff --git a/Launcher/source/request/update/UpdateRequest.java b/Launcher/source/request/update/UpdateRequest.java
index 94ac61b..e685a0b 100644
--- a/Launcher/source/request/update/UpdateRequest.java
+++ b/Launcher/source/request/update/UpdateRequest.java
@@ -44,12 +44,18 @@
 	private Instant startTime;
 
 	@LauncherAPI
-	public UpdateRequest(String dirName, Path dir, FileNameMatcher matcher) {
+	public UpdateRequest(Launcher.Config config, String dirName, Path dir, FileNameMatcher matcher) {
+		super(config);
 		this.dirName = IOHelper.verifyFileName(dirName);
 		this.dir = dir;
 		this.matcher = matcher;
 	}
 
+	@LauncherAPI
+	public UpdateRequest(String dirName, Path dir, FileNameMatcher matcher) {
+		this(null, dirName, dir, matcher);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.UPDATE;
@@ -72,7 +78,7 @@
 		readError(input);
 
 		// Get diff between local and remote dir
-		SignedObjectHolder<HashedDir> remoteHDirHolder = new SignedObjectHolder<>(input, Launcher.getConfig().publicKey, HashedDir::new);
+		SignedObjectHolder<HashedDir> remoteHDirHolder = new SignedObjectHolder<>(input, config.publicKey, HashedDir::new);
 		HashedDir.Diff diff = remoteHDirHolder.object.diff(localDir, matcher);
 		totalSize = diff.mismatch.size();
 
diff --git a/Launcher/source/request/uuid/BatchProfileByUsernameRequest.java b/Launcher/source/request/uuid/BatchProfileByUsernameRequest.java
index 9e7cce3..724655e 100644
--- a/Launcher/source/request/uuid/BatchProfileByUsernameRequest.java
+++ b/Launcher/source/request/uuid/BatchProfileByUsernameRequest.java
@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.util.Arrays;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.client.PlayerProfile;
 import launcher.helper.IOHelper;
@@ -16,7 +17,8 @@
 	private final String[] usernames;
 
 	@LauncherAPI
-	public BatchProfileByUsernameRequest(String... usernames) throws IOException {
+	public BatchProfileByUsernameRequest(Launcher.Config config, String... usernames) throws IOException {
+		super(config);
 		this.usernames = Arrays.copyOf(usernames, usernames.length);
 		IOHelper.verifyLength(this.usernames.length, MAX_BATCH_SIZE);
 		for (String username : this.usernames) {
@@ -24,6 +26,11 @@
 		}
 	}
 
+	@LauncherAPI
+	public BatchProfileByUsernameRequest(String... usernames) throws IOException {
+		this(null, usernames);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.BATCH_PROFILE_BY_USERNAME;
@@ -43,7 +50,7 @@
 			profiles[i] = input.readBoolean() ? new PlayerProfile(input) : null;
 		}
 
-		// Return profile
+		// Return result
 		return profiles;
 	}
 }
diff --git a/Launcher/source/request/uuid/ProfileByUUIDRequest.java b/Launcher/source/request/uuid/ProfileByUUIDRequest.java
index 0e62b27..acfe04b 100644
--- a/Launcher/source/request/uuid/ProfileByUUIDRequest.java
+++ b/Launcher/source/request/uuid/ProfileByUUIDRequest.java
@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.util.UUID;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.client.PlayerProfile;
 import launcher.request.Request;
@@ -13,10 +14,16 @@
 	private final UUID uuid;
 
 	@LauncherAPI
-	public ProfileByUUIDRequest(UUID uuid) {
+	public ProfileByUUIDRequest(Launcher.Config config, UUID uuid) {
+		super(config);
 		this.uuid = uuid;
 	}
 
+	@LauncherAPI
+	public ProfileByUUIDRequest(UUID uuid) {
+		this(null, uuid);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.PROFILE_BY_UUID;
@@ -30,4 +37,4 @@
 		// Return profile
 		return input.readBoolean() ? new PlayerProfile(input) : null;
 	}
-}
\ No newline at end of file
+}
diff --git a/Launcher/source/request/uuid/ProfileByUsernameRequest.java b/Launcher/source/request/uuid/ProfileByUsernameRequest.java
index b679283..b1f8564 100644
--- a/Launcher/source/request/uuid/ProfileByUsernameRequest.java
+++ b/Launcher/source/request/uuid/ProfileByUsernameRequest.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 
+import launcher.Launcher;
 import launcher.LauncherAPI;
 import launcher.client.PlayerProfile;
 import launcher.helper.VerifyHelper;
@@ -13,10 +14,16 @@
 	private final String username;
 
 	@LauncherAPI
-	public ProfileByUsernameRequest(String username) {
+	public ProfileByUsernameRequest(Launcher.Config config, String username) {
+		super(config);
 		this.username = VerifyHelper.verifyUsername(username);
 	}
 
+	@LauncherAPI
+	public ProfileByUsernameRequest(String username) {
+		this(null, username);
+	}
+
 	@Override
 	public Type getType() {
 		return Type.PROFILE_BY_USERNAME;