diff --git a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
index dd930135..6dac9df7 100644
--- a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
@@ -1,6 +1,8 @@
 using System;                    // +++
 using System.IO;                 // +++
 using System.Linq;               // +++
+using System.Threading.Tasks;    // +++
+using System.Collections.Generic;// +++
 using System.Reactive;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
@@ -64,7 +66,7 @@ public class CheckUpdateViewModel : MyReactiveObject
         CheckUpdateModels.Add(GetCheckUpdateModel(_geo));
     }
 
-    // +++ 新增：在打包环境(AppImage/DEB/RPM)下返回 true；其他返回 false
+    // ---- packaged env detection: AppImage or runs from /opt/v2rayN ----
     private static bool IsPackagedInstall()
     {
         try
@@ -72,28 +74,31 @@ public class CheckUpdateViewModel : MyReactiveObject
             if (Utils.IsWindows())
                 return false;
 
-            // AppImage: 环境变量 APPIMAGE 存在
+            // AppImage: APPIMAGE var exists
             if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("APPIMAGE")))
                 return true;
 
-            // 安装到 /opt/v2rayN 视为打包安装（deb/rpm）
-            var sp = Utils.StartupPath()?.Replace('\\', '/');
-            if (!string.IsNullOrEmpty(sp) && sp.StartsWith("/opt/v2rayN", StringComparison.OrdinalIgnoreCase))
-                return true;
-
-            if (Directory.Exists("/opt/v2rayN"))
-                return true;
+            // deb/rpm: current startup path is under /opt/v2rayN
+            var sp = Utils.StartupPath();
+            if (!string.IsNullOrEmpty(sp))
+            {
+                sp = sp.Replace('\\', '/');
+                if (sp.Equals("/opt/v2rayN", StringComparison.OrdinalIgnoreCase) ||
+                    sp.StartsWith("/opt/v2rayN/", StringComparison.OrdinalIgnoreCase))
+                {
+                    return true;
+                }
+            }
         }
         catch
         {
-            // ignore
         }
         return false;
     }
 
     private CheckUpdateModel GetCheckUpdateModel(string coreType)
     {
-        // +++ 打包环境下禁用 v2rayN 自更新，默认关并标注 Not Support
+        // packaged env: disable v2rayN self-update
         if (coreType == _v2rayN && IsPackagedInstall())
         {
             return new()
@@ -114,7 +119,7 @@ public class CheckUpdateViewModel : MyReactiveObject
 
     private async Task SaveSelectedCoreTypes()
     {
-        // +++ 打包环境下，不保存 v2rayN 的选择状态
+        // packaged env: do not persist v2rayN toggle
         var list = CheckUpdateModels
             .Where(t => t.IsSelected == true && !(IsPackagedInstall() && t.CoreType == _v2rayN))
             .Select(t => t.CoreType ?? "")
@@ -151,7 +156,6 @@ public class CheckUpdateViewModel : MyReactiveObject
             }
             else if (item.CoreType == _v2rayN)
             {
-                // +++ 打包环境下，直接跳过 v2rayN 自更新
                 if (IsPackagedInstall())
                 {
                     await UpdateView(_v2rayN, "Not Support");
@@ -193,200 +197,4 @@ public class CheckUpdateViewModel : MyReactiveObject
             await UpdateView(_geo, msg);
             if (success)
             {
-                UpdatedPlusPlus(_geo, "");
-            }
-        }
-        await (new UpdateService()).UpdateGeoFileAll(_config, _updateUI)
-            .ContinueWith(t =>
-            {
-                UpdatedPlusPlus(_geo, "");
-            });
-    }
-
-    private async Task CheckUpdateN(bool preRelease)
-    {
-        async Task _updateUI(bool success, string msg)
-        {
-            await UpdateView(_v2rayN, msg);
-            if (success)
-            {
-                await UpdateView(_v2rayN, ResUI.OperationSuccess);
-                UpdatedPlusPlus(_v2rayN, msg);
-            }
-        }
-        await (new UpdateService()).CheckUpdateGuiN(_config, _updateUI, preRelease)
-            .ContinueWith(t =>
-            {
-                UpdatedPlusPlus(_v2rayN, "");
-            });
-    }
-
-    private async Task CheckUpdateCore(CheckUpdateModel model, bool preRelease)
-    {
-        async Task _updateUI(bool success, string msg)
-        {
-            await UpdateView(model.CoreType, msg);
-            if (success)
-            {
-                await UpdateView(model.CoreType, ResUI.MsgUpdateV2rayCoreSuccessfullyMore);
-
-                UpdatedPlusPlus(model.CoreType, msg);
-            }
-        }
-        var type = (ECoreType)Enum.Parse(typeof(ECoreType), model.CoreType);
-        await (new UpdateService()).CheckUpdateCore(type, _config, _updateUI, preRelease)
-            .ContinueWith(t =>
-            {
-                UpdatedPlusPlus(model.CoreType, "");
-            });
-    }
-
-    private async Task UpdateFinished()
-    {
-        if (_lstUpdated.Count > 0 && _lstUpdated.Count(x => x.IsFinished == true) == _lstUpdated.Count)
-        {
-            await UpdateFinishedSub(false);
-            await Task.Delay(2000);
-            await UpgradeCore();
-
-            if (_lstUpdated.Any(x => x.CoreType == _v2rayN && x.IsFinished == true))
-            {
-                await Task.Delay(1000);
-                await UpgradeN();
-            }
-            await Task.Delay(1000);
-            await UpdateFinishedSub(true);
-        }
-    }
-
-    private async Task UpdateFinishedSub(bool blReload)
-    {
-        RxApp.MainThreadScheduler.Schedule(blReload, (scheduler, blReload) =>
-        {
-            _ = UpdateFinishedResult(blReload);
-            return Disposable.Empty;
-        });
-    }
-
-    public async Task UpdateFinishedResult(bool blReload)
-    {
-        if (blReload)
-        {
-            Locator.Current.GetService<MainWindowViewModel>()?.Reload();
-        }
-        else
-        {
-            Locator.Current.GetService<MainWindowViewModel>()?.CloseCore();
-        }
-    }
-
-    private async Task UpgradeN()
-    {
-        try
-        {
-            var fileName = _lstUpdated.FirstOrDefault(x => x.CoreType == _v2rayN)?.FileName;
-            if (fileName.IsNullOrEmpty())
-            {
-                return;
-            }
-            if (!Utils.UpgradeAppExists(out var upgradeFileName))
-            {
-                await UpdateView(_v2rayN, ResUI.UpgradeAppNotExistTip);
-                NoticeManager.Instance.SendMessageAndEnqueue(ResUI.UpgradeAppNotExistTip);
-                Logging.SaveLog("UpgradeApp does not exist");
-                return;
-            }
-
-            var id = ProcUtils.ProcessStart(upgradeFileName, fileName, Utils.StartupPath());
-            if (id > 0)
-            {
-                await AppManager.Instance.AppExitAsync(true);
-            }
-        }
-        catch (Exception ex)
-        {
-            await UpdateView(_v2rayN, ex.Message);
-        }
-    }
-
-    private async Task UpgradeCore()
-    {
-        foreach (var item in _lstUpdated)
-        {
-            if (item.FileName.IsNullOrEmpty())
-            {
-                continue;
-            }
-
-            var fileName = item.FileName;
-            if (!File.Exists(fileName))
-            {
-                continue;
-            }
-            var toPath = Utils.GetBinPath("", item.CoreType);
-
-            if (fileName.Contains(".tar.gz"))
-            {
-                FileManager.DecompressTarFile(fileName, toPath);
-                var dir = new DirectoryInfo(toPath);
-                if (dir.Exists)
-                {
-                    foreach (var subDir in dir.GetDirectories())
-                    {
-                        FileManager.CopyDirectory(subDir.FullName, toPath, false, true);
-                        subDir.Delete(true);
-                    }
-                }
-            }
-            else if (fileName.Contains(".gz"))
-            {
-                FileManager.DecompressFile(fileName, toPath, item.CoreType);
-            }
-            else
-            {
-                FileManager.ZipExtractToFile(fileName, toPath, "geo");
-            }
-
-            if (Utils.IsNonWindows())
-            {
-                var filesList = (new DirectoryInfo(toPath)).GetFiles().Select(u => u.FullName).ToList();
-                foreach (var file in filesList)
-                {
-                    await Utils.SetLinuxChmod(Path.Combine(toPath, item.CoreType.ToLower()));
-                }
-            }
-
-            await UpdateView(item.CoreType, ResUI.MsgUpdateV2rayCoreSuccessfully);
-
-            if (File.Exists(fileName))
-            {
-                File.Delete(fileName);
-            }
-        }
-    }
-
-    private async Task UpdateView(string coreType, string msg)
-    {
-        var item = new CheckUpdateModel()
-        {
-            CoreType = coreType,
-            Remarks = msg,
-        };
-
-        RxApp.MainThreadScheduler.Schedule(item, (scheduler, model) =>
-        {
-            _ = UpdateViewResult(model);
-            return Disposable.Empty;
-        });
-    }
-
-    public async Task UpdateViewResult(CheckUpdateModel model)
-    {
-        var found = CheckUpdateModels.FirstOrDefault(t => t.CoreType == model.CoreType);
-        if (found == null)
-        {
-            return;
-        }
-        found.Remarks = model.Remarks; 
-    }
-}
+                Updated