- [Core] fix crash issue when opening multiple instances.

AssetStudio.CLI/Program.cs

@@ -39,8 +39,8 @@ namespace AssetStudio.CLI
                 }
 
                 Studio.Game = game;
-                Logger.LogVerbose = o.Verbose;
                 Logger.Default = new ConsoleLogger();
+                Logger.LogVerbose = o.Verbose;
                 Logger.FileLogging = Settings.Default.enableFileLogging;
                 AssetsHelper.Minimal = Settings.Default.minimalAssetMap;
                 AssetsHelper.SetUnityVersion(o.UnityVersion);

AssetStudio.GUI/MainForm.cs

@@ -115,8 +115,6 @@ namespace AssetStudio.GUI
 
         private void InitializeLogger()
         {
-            Logger.LogVerbose = enableVerbose.Checked;
-            Logger.FileLogging = enableFileLogging.Checked;
             logger = new GUILogger(StatusStripUpdate);
             ConsoleHelper.AllocConsole();
             ConsoleHelper.SetConsoleTitle("Debug Console");
@@ -131,6 +129,8 @@ namespace AssetStudio.GUI
                 Logger.Default = logger;
                 ConsoleHelper.ShowWindow(handle, ConsoleHelper.SW_HIDE);
             }
+            Logger.LogVerbose = enableVerbose.Checked;
+            Logger.FileLogging = enableFileLogging.Checked;
         }
 
         private void InitializeProgressBar()

AssetStudio/Logger.cs

@@ -22,9 +22,18 @@ namespace AssetStudio
             {
                 _fileLogging = value;
                 if (_fileLogging)
+                {
+                    try
                     {
                         File = new FileLogger();
                     }
+                    catch
+                    {
+                        _fileLogging = false;
+                        Error("log file is already in use, disabling...");
+                        return;
+                    }
+                }
                 else
                 {
                     ((FileLogger)File)?.Writer?.Dispose();