diff --git a/src/MaaWpfGui/App.xaml.cs b/src/MaaWpfGui/App.xaml.cs
index 7eedce5aba..bf3b6a30ad 100644
--- a/src/MaaWpfGui/App.xaml.cs
+++ b/src/MaaWpfGui/App.xaml.cs
@@ -33,40 +33,5 @@ namespace MaaWpfGui
                 Process.Start(new ProcessStartInfo(link.NavigateUri.AbsoluteUri));
             }
         }
-
-        //private Mutex _mutex;
-
-        protected override void OnStartup(StartupEventArgs e)
-        {
-            // FIXME: 版本更新之后，这里重新打开进程应用更新包，这里是必炸的
-            // 先全删掉，等学姐来修（
-
-            //// 设置互斥量的名称
-            //string mutexName = "MAA_" + Directory.GetCurrentDirectory().Replace("\\", "_").Replace(":", string.Empty);
-            //_mutex = new Mutex(true, mutexName);
-
-            //if (!_mutex.WaitOne(TimeSpan.Zero, true))
-            //{
-            //    // 这里还没加载语言包，就不 GetString 了
-            //    MessageBox.Show("同一路径下只能启动一个实例！\n\n" +
-            //                    "同一路徑下只能啟動一個實例！\n\n" +
-            //                    "Only one instance can be launched under the same path!\n\n" +
-            //                    "同じパスの下で1つのインスタンスしか起動できません！\n\n" +
-            //                    "동일한 경로에는 하나의 인스턴스만 실행할 수 있습니다!");
-            //    Current.Shutdown();
-            //    return;
-            //}
-
-            base.OnStartup(e);
-        }
-
-        protected override void OnExit(ExitEventArgs e)
-        {
-            //// 释放互斥量
-            //_mutex.ReleaseMutex();
-            //_mutex.Dispose();
-
-            base.OnExit(e);
-        }
     }
 }
diff --git a/src/MaaWpfGui/Main/Bootstrapper.cs b/src/MaaWpfGui/Main/Bootstrapper.cs
index 6338ba8365..fdfe8d26fb 100644
--- a/src/MaaWpfGui/Main/Bootstrapper.cs
+++ b/src/MaaWpfGui/Main/Bootstrapper.cs
@@ -14,6 +14,7 @@
 using System;
 using System.IO;
 using System.Runtime.InteropServices;
+using System.Threading;
 using System.Windows;
 using System.Windows.Threading;
 using GlobalHotKey;
@@ -38,11 +39,28 @@ namespace MaaWpfGui.Main
     public class Bootstrapper : Bootstrapper<RootViewModel>
     {
         private static ILogger _logger = Logger.None;
+        private static Mutex _mutex;
 
         /// <inheritdoc/>
         /// <remarks>初始化些啥自己加。</remarks>
         protected override void OnStart()
         {
+            // 设置互斥量的名称
+            string mutexName = "MAA_" + Directory.GetCurrentDirectory().Replace("\\", "_").Replace(":", string.Empty);
+            _mutex = new Mutex(true, mutexName);
+
+            if (!_mutex.WaitOne(TimeSpan.Zero, true))
+            {
+                // 这里还没加载语言包，就不 GetString 了
+                MessageBox.Show("同一路径下只能启动一个实例！\n\n" +
+                                "同一路徑下只能啟動一個實例！\n\n" +
+                                "Only one instance can be launched under the same path!\n\n" +
+                                "同じパスの下で1つのインスタンスしか起動できません！\n\n" +
+                                "동일한 경로에는 하나의 인스턴스만 실행할 수 있습니다!");
+                Application.Current.Shutdown();
+                return;
+            }
+
             Directory.SetCurrentDirectory(AppDomain.CurrentDomain.BaseDirectory);
             if (Directory.Exists("debug") is false)
             {
@@ -158,6 +176,10 @@ namespace MaaWpfGui.Main
         /// <remarks>退出时执行啥自己加。</remarks>
         protected override void OnExit(ExitEventArgs e)
         {
+            // 释放互斥量
+            _mutex?.ReleaseMutex();
+            _mutex?.Dispose();
+
             // MessageBox.Show("O(∩_∩)O 拜拜");
             Instances.SettingsViewModel.Sober();
 
@@ -174,6 +196,19 @@ namespace MaaWpfGui.Main
 
             _logger.Information("MaaAssistantArknights GUI exited");
             _logger.Information(string.Empty);
+            base.OnExit(e);
+        }
+
+        public static void RestartApplication()
+        {
+            // 释放互斥量
+            _mutex?.ReleaseMutex();
+            _mutex?.Dispose();
+
+            // 避免 OnExit 时再次释放
+            _mutex = null;
+
+            System.Windows.Forms.Application.Restart();
         }
 
         /// <inheritdoc/>
diff --git a/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs b/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
index e9535990a9..a7804c24db 100644
--- a/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
+++ b/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
@@ -114,7 +114,7 @@ namespace MaaWpfGui.ViewModels.UI
                     iconKey: "HangoverGeometry",
                     iconBrushKey: "PallasBrush");
                 Application.Current.Shutdown();
-                System.Windows.Forms.Application.Restart();
+                Bootstrapper.RestartApplication();
             }
         }
 
@@ -2558,7 +2558,7 @@ namespace MaaWpfGui.ViewModels.UI
                 if (result == MessageBoxResult.OK)
                 {
                     Application.Current.Shutdown();
-                    System.Windows.Forms.Application.Restart();
+                    Bootstrapper.RestartApplication();
                 }
                 */
             }
@@ -2693,7 +2693,7 @@ namespace MaaWpfGui.ViewModels.UI
                 if (result == MessageBoxResult.OK)
                 {
                     Application.Current.Shutdown();
-                    System.Windows.Forms.Application.Restart();
+                    Bootstrapper.RestartApplication();
                 }
 
                 SetAndNotify(ref _language, value);
@@ -2763,7 +2763,7 @@ namespace MaaWpfGui.ViewModels.UI
             if (result == MessageBoxResult.OK)
             {
                 Application.Current.Shutdown();
-                System.Windows.Forms.Application.Restart();
+                Bootstrapper.RestartApplication();
             }
         }
 
diff --git a/src/MaaWpfGui/ViewModels/UI/VersionUpdateViewModel.cs b/src/MaaWpfGui/ViewModels/UI/VersionUpdateViewModel.cs
index b6d0eded52..0b8480de13 100644
--- a/src/MaaWpfGui/ViewModels/UI/VersionUpdateViewModel.cs
+++ b/src/MaaWpfGui/ViewModels/UI/VersionUpdateViewModel.cs
@@ -26,6 +26,7 @@ using System.Windows.Documents;
 using System.Windows.Input;
 using MaaWpfGui.Constants;
 using MaaWpfGui.Helper;
+using MaaWpfGui.Main;
 using Markdig;
 using Markdig.Wpf;
 using Newtonsoft.Json;
@@ -567,7 +568,7 @@ namespace MaaWpfGui.ViewModels.UI
             if (result == MessageBoxResult.OK)
             {
                 Application.Current.Shutdown();
-                System.Windows.Forms.Application.Restart();
+                Bootstrapper.RestartApplication();
             }
         }