diff --git a/LaunchServer/resources/launchserver/defaults/profile1.6.4.cfg b/LaunchServer/resources/launchserver/defaults/profile1.6.4.cfg
old mode 100644
new mode 100755
index ef61ede..0f5b8b1
--- a/LaunchServer/resources/launchserver/defaults/profile1.6.4.cfg
+++ b/LaunchServer/resources/launchserver/defaults/profile1.6.4.cfg
@@ -33,6 +33,9 @@
 	"-Dfml.ignoreInvalidMinecraftCertificates=true",
 	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true",
 
+	# JVM Attach protection
+	"-XX:+DisableAttachMechanism",
+
 	# Legacy bridge (for 1.6.4 & lower) settings
 	"-Dlauncher.legacy.skinsURL=http://skins.minecraft.net/MinecraftSkins/%username%.png",
 	"-Dlauncher.legacy.cloaksURL=http://skins.minecraft.net/MinecraftCloaks/%username%.png"
diff --git a/LaunchServer/resources/launchserver/defaults/profile1.7.10.cfg b/LaunchServer/resources/launchserver/defaults/profile1.7.10.cfg
old mode 100644
new mode 100755
index 1fda1e3..bc1a1a9
--- a/LaunchServer/resources/launchserver/defaults/profile1.7.10.cfg
+++ b/LaunchServer/resources/launchserver/defaults/profile1.7.10.cfg
@@ -31,7 +31,10 @@
 jvmArgs: [
 	"-Dfml.ignorePatchDiscrepancies=true",
 	"-Dfml.ignoreInvalidMinecraftCertificates=true",
-	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true"
+	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true",
+
+	# Experimental
+	"-XX:+DisableAttachMechanism"
 ];
 clientArgs: [
 	"--tweakClass", "cpw.mods.fml.common.launcher.FMLTweaker"
diff --git a/LaunchServer/resources/launchserver/defaults/profile1.7.2.cfg b/LaunchServer/resources/launchserver/defaults/profile1.7.2.cfg
old mode 100644
new mode 100755
index 6f7e99a..b8241bf
--- a/LaunchServer/resources/launchserver/defaults/profile1.7.2.cfg
+++ b/LaunchServer/resources/launchserver/defaults/profile1.7.2.cfg
@@ -31,7 +31,10 @@
 jvmArgs: [
 	"-Dfml.ignorePatchDiscrepancies=true",
 	"-Dfml.ignoreInvalidMinecraftCertificates=true",
-	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true"
+	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true",
+
+	# JVM Attach protection
+	"-XX:+DisableAttachMechanism"
 ];
 clientArgs: [
 	"--tweakClass", "cpw.mods.fml.common.launcher.FMLTweaker"
diff --git a/LaunchServer/resources/launchserver/defaults/profile1.8.8.cfg b/LaunchServer/resources/launchserver/defaults/profile1.8.8.cfg
deleted file mode 100644
index 3d918d8..0000000
--- a/LaunchServer/resources/launchserver/defaults/profile1.8.8.cfg
+++ /dev/null
@@ -1,34 +0,0 @@
-version: "1.8.8";
-assetIndex: "1.8.8"; # 1.7.10+ only
-
-# Runtime-dependent params
-dir: "XXXXX";
-assetDir: "asset1.8.8";
-
-# Client params
-sortIndex: 0;
-title: "XXXXX";
-serverAddress: "server.tld";
-serverPort: 25565;
-
-# Updater and client watch service
-update: [
-	"servers\\.dat"
-];
-updateVerify: [
-	"libraries", "natives", "mods",
-	"minecraft\\.jar", "forge\\.jar"
-];
-updateExclusions: [];
-
-# Client launcher params
-mainClass: "net.minecraft.launchwrapper.Launch";
-classPath: [ "forge.jar", "minecraft.jar", "libraries" ];
-jvmArgs: [
-	"-Dfml.ignorePatchDiscrepancies=true",
-	"-Dfml.ignoreInvalidMinecraftCertificates=true",
-	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true"
-];
-clientArgs: [
-	"--tweakClass", "net.minecraftforge.fml.common.launcher.FMLTweaker"
-];
diff --git a/LaunchServer/resources/launchserver/defaults/profile1.8.9.cfg b/LaunchServer/resources/launchserver/defaults/profile1.8.9.cfg
new file mode 100755
index 0000000..7d8c09f
--- /dev/null
+++ b/LaunchServer/resources/launchserver/defaults/profile1.8.9.cfg
@@ -0,0 +1,37 @@
+version: "1.8.9";
+assetIndex: "1.8.9"; # 1.7.10+ only
+
+# Runtime-dependent params
+dir: "XXXXX";
+assetDir: "asset1.8.9";
+
+# Client params
+sortIndex: 0;
+title: "XXXXX";
+serverAddress: "server.tld";
+serverPort: 25565;
+
+# Updater and client watch service
+update: [
+	"servers\\.dat"
+];
+updateVerify: [
+	"libraries", "natives", "mods",
+	"minecraft\\.jar", "forge\\.jar"
+];
+updateExclusions: [];
+
+# Client launcher params
+mainClass: "net.minecraft.launchwrapper.Launch";
+classPath: [ "forge.jar", "minecraft.jar", "libraries" ];
+jvmArgs: [
+	"-Dfml.ignorePatchDiscrepancies=true",
+	"-Dfml.ignoreInvalidMinecraftCertificates=true",
+	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true",
+
+	# JVM Attach protection
+	"-XX:+DisableAttachMechanism"
+];
+clientArgs: [
+	"--tweakClass", "net.minecraftforge.fml.common.launcher.FMLTweaker"
+];
diff --git a/LaunchServer/resources/launchserver/defaults/profile1.9.cfg b/LaunchServer/resources/launchserver/defaults/profile1.9.cfg
new file mode 100755
index 0000000..f8a3659
--- /dev/null
+++ b/LaunchServer/resources/launchserver/defaults/profile1.9.cfg
@@ -0,0 +1,37 @@
+version: "1.9";
+assetIndex: "1.9"; # 1.7.10+ only
+
+# Runtime-dependent params
+dir: "XXXXX";
+assetDir: "asset1.9";
+
+# Client params
+sortIndex: 0;
+title: "XXXXX";
+serverAddress: "server.tld";
+serverPort: 25565;
+
+# Updater and client watch service
+update: [
+	"servers\\.dat"
+];
+updateVerify: [
+	"libraries", "natives", "mods",
+	"minecraft\\.jar", "forge\\.jar"
+];
+updateExclusions: [];
+
+# Client launcher params
+mainClass: "net.minecraft.launchwrapper.Launch";
+classPath: [ "forge.jar", "minecraft.jar", "libraries" ];
+jvmArgs: [
+	"-Dfml.ignorePatchDiscrepancies=true",
+	"-Dfml.ignoreInvalidMinecraftCertificates=true",
+	"-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true",
+
+	# JVM Attach protection
+	"-XX:+DisableAttachMechanism"
+];
+clientArgs: [
+	"--tweakClass", "net.minecraftforge.fml.common.launcher.FMLTweaker"
+];
diff --git a/Launcher/source/Launcher.java b/Launcher/source/Launcher.java
old mode 100644
new mode 100755
index c921e51..9080c52
--- a/Launcher/source/Launcher.java
+++ b/Launcher/source/Launcher.java
@@ -70,7 +70,7 @@
 	private static final AtomicReference<Config> CONFIG = new AtomicReference<>();
 
 	// Version info
-	@LauncherAPI public static final String VERSION = "15.1-fix1";
+	@LauncherAPI public static final String VERSION = "15.2";
 	@LauncherAPI public static final String BUILD = readBuildNumber();
 	@LauncherAPI public static final int PROTOCOL_MAGIC = 0x724724_16;
 
diff --git a/Launcher/source/client/ClientProfile.java b/Launcher/source/client/ClientProfile.java
old mode 100644
new mode 100755
index f35f413..6e8fad5
--- a/Launcher/source/client/ClientProfile.java
+++ b/Launcher/source/client/ClientProfile.java
@@ -189,7 +189,7 @@
 
 	@LauncherAPI
 	public enum Version {
-		MC164("1.6.4", 78), MC172("1.7.2", 4), MC1710("1.7.10", 5), MC188("1.8.8", 47);
+		MC164("1.6.4", 78), MC172("1.7.2", 4), MC1710("1.7.10", 5), MC189("1.8.9", 47), MC19("1.9", 107);
 		private static final Map<String, Version> VERSIONS;
 		public final String name;
 		public final int protocol;