diff --git a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/auth/SetProfileResponse.java b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/auth/SetProfileResponse.java
index 5488d739..51f4e131 100644
--- a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/auth/SetProfileResponse.java
+++ b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/auth/SetProfileResponse.java
@@ -29,7 +29,7 @@ public void execute(ChannelHandlerContext ctx, Client client) {
         for (ClientProfile p : profiles) {
             if (p.getTitle().equals(this.client)) {
                 if (server.config.protectHandler instanceof ProfilesProtectHandler &&
-                        ((ProfilesProtectHandler) server.config.protectHandler).canChangeProfile(p, client)) {
+                        !((ProfilesProtectHandler) server.config.protectHandler).canChangeProfile(p, client)) {
                     sendError("Access denied");
                     return;
                 }
diff --git a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/update/UpdateResponse.java b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/update/UpdateResponse.java
index 68a21a6d..10e7a43d 100644
--- a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/update/UpdateResponse.java
+++ b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/response/update/UpdateResponse.java
@@ -21,7 +21,7 @@ public String getType() {
 
     @Override
     public void execute(ChannelHandlerContext ctx, Client client) {
-        if (server.config.protectHandler instanceof ProfilesProtectHandler && ((ProfilesProtectHandler) server.config.protectHandler).canGetUpdates(dirName, client)) {
+        if (server.config.protectHandler instanceof ProfilesProtectHandler && !((ProfilesProtectHandler) server.config.protectHandler).canGetUpdates(dirName, client)) {
             sendError("Access denied");
             return;
         }
diff --git a/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherEntryPoint.java b/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherEntryPoint.java
index 12302ff0..d9d6e0ee 100644
--- a/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherEntryPoint.java
+++ b/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherEntryPoint.java
@@ -40,7 +40,7 @@
 import java.util.stream.Stream;
 
 public class ClientLauncherEntryPoint {
-    private ClientLauncherProcess.ClientParams readParams(SocketAddress address) throws IOException {
+    private static ClientLauncherProcess.ClientParams readParams(SocketAddress address) throws IOException {
         try (Socket socket = IOHelper.newSocket())
         {
             socket.connect(address);
@@ -56,7 +56,7 @@ private ClientLauncherProcess.ClientParams readParams(SocketAddress address) thr
         }
     }
     private static ClientClassLoader classLoader;
-    public void main(String[] args) throws Throwable {
+    public static void main(String[] args) throws Throwable {
         LauncherEngine.IS_CLIENT.set(true);
         LauncherEngine engine = LauncherEngine.clientInstance();
         LauncherEngine.checkClass(LauncherEngine.class);
@@ -68,9 +68,9 @@ public void main(String[] args) throws Throwable {
         initGson(LauncherEngine.modulesManager);
         LauncherEngine.verifyNoAgent();
         LauncherEngine.modulesManager.invokeEvent(new PreConfigPhase());
-        JVMHelper.verifySystemProperties(ClientLauncher.class, true);
+        JVMHelper.verifySystemProperties(ClientLauncherEntryPoint.class, true);
         EnvHelper.checkDangerousParams();
-        JVMHelper.checkStackTrace(ClientLauncher.class);
+        JVMHelper.checkStackTrace(ClientLauncherEntryPoint.class);
         LogHelper.printVersion("Client Launcher");
         engine.readKeys();
         LauncherGuardManager.initGuard(true);
diff --git a/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherProcess.java b/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherProcess.java
index ce35f58a..5c3bc532 100644
--- a/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherProcess.java
+++ b/Launcher/src/main/java/pro/gravit/launcher/client/ClientLauncherProcess.java
@@ -8,10 +8,7 @@
 import pro.gravit.launcher.request.Request;
 import pro.gravit.launcher.serialize.HOutput;
 import pro.gravit.utils.Version;
-import pro.gravit.utils.helper.EnvHelper;
-import pro.gravit.utils.helper.IOHelper;
-import pro.gravit.utils.helper.JVMHelper;
-import pro.gravit.utils.helper.SecurityHelper;
+import pro.gravit.utils.helper.*;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -26,7 +23,7 @@
 
 public class ClientLauncherProcess {
     private transient Process process;
-    private final transient Boolean[] waitWriteParams = new Boolean[1];
+    private final transient Boolean[] waitWriteParams = new Boolean[] {false};
     public final Path executeFile;
     public final Path workDir;
     public final Path javaDir;
@@ -136,8 +133,8 @@ public void addClientLegacyArgs(Collection<String> args) {
 
             // Add args for tweaker
             Collections.addAll(args, "--version", profile.getVersion().name);
-            Collections.addAll(args, "--gameDir", clientDir.toString());
-            Collections.addAll(args, "--assetsDir", assetDir.toString());
+            Collections.addAll(args, "--gameDir", clientDir);
+            Collections.addAll(args, "--assetsDir", assetDir);
         }
 
         private void addModernClientArgs(Collection<String> args) {
@@ -201,6 +198,7 @@ public void start(boolean pipeOutput) throws IOException, InterruptedException {
         processArgs.add("-cp");
         //ADD CLASSPATH
         processArgs.add(String.join(getPathSeparator(), systemClassPath));
+        processArgs.add(mainClass);
         processArgs.addAll(systemClientArgs);
         synchronized (waitWriteParams)
         {
@@ -209,6 +207,8 @@ public void start(boolean pipeOutput) throws IOException, InterruptedException {
                 waitWriteParams.wait(1000);
             }
         }
+        if(LogHelper.isDebugEnabled())
+        LogHelper.debug("Commandline: %s", Arrays.toString(processArgs.toArray()));
         ProcessBuilder processBuilder = new ProcessBuilder(processArgs);
         EnvHelper.addEnv(processBuilder);
         processBuilder.environment().putAll(systemEnv);
diff --git a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
index 8f1ce9a3..94a1d0d1 100644
--- a/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
+++ b/LauncherAPI/src/main/java/pro/gravit/launcher/profiles/ClientProfile.java
@@ -157,7 +157,7 @@ public String[] getClassPath() {
     }
 
     public String[] getAlternativeClassPath() {
-        return classPath.toArray(new String[0]);
+        return altClassPath.toArray(new String[0]);
     }