diff --git a/v2rayN/ServiceLib/Common/FileManager.cs b/v2rayN/ServiceLib/Common/FileManager.cs
index 70b093146a8..b98b165526e 100644
--- a/v2rayN/ServiceLib/Common/FileManager.cs
+++ b/v2rayN/ServiceLib/Common/FileManager.cs
@@ -1,4 +1,5 @@
-using System.IO.Compression;
+using System.Formats.Tar;
+using System.IO.Compression;
 using System.Text;
 
 namespace ServiceLib.Common
@@ -19,7 +20,7 @@ public static bool ByteArrayToFile(string fileName, byte[] content)
             return false;
         }
 
-        public static void UncompressedFile(string fileName, byte[] content)
+        public static void DecompressFile(string fileName, byte[] content)
         {
             try
             {
@@ -33,7 +34,7 @@ public static void UncompressedFile(string fileName, byte[] content)
             }
         }
 
-        public static void UncompressedFile(string fileName, string toPath, string? toName)
+        public static void DecompressFile(string fileName, string toPath, string? toName)
         {
             try
             {
@@ -49,6 +50,20 @@ public static void UncompressedFile(string fileName, string toPath, string? toNa
             }
         }
 
+        public static void DecompressTarFile(string fileName, string toPath)
+        {
+            try
+            {
+                using var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
+                using var gz = new GZipStream(fs, CompressionMode.Decompress, leaveOpen: true);
+                TarFile.ExtractToDirectory(gz, toPath, overwriteFiles: true);
+            }
+            catch (Exception ex)
+            {
+                Logging.SaveLog(ex.Message, ex);
+            }
+        }
+
         public static string NonExclusiveReadAllText(string path)
         {
             return NonExclusiveReadAllText(path, Encoding.Default);
@@ -139,7 +154,7 @@ public static bool CreateFromDirectory(string sourceDirectoryName, string destin
             return true;
         }
 
-        public static void CopyDirectory(string sourceDir, string destinationDir, bool recursive, string ignoredName)
+        public static void CopyDirectory(string sourceDir, string destinationDir, bool recursive, string? ignoredName)
         {
             // Get information about the source directory
             var dir = new DirectoryInfo(sourceDir);
@@ -166,7 +181,7 @@ public static void CopyDirectory(string sourceDir, string destinationDir, bool r
                     continue;
                 }
                 var targetFilePath = Path.Combine(destinationDir, file.Name);
-                file.CopyTo(targetFilePath);
+                file.CopyTo(targetFilePath, true);
             }
 
             // If recursive and copying subdirectories, recursively call this method
diff --git a/v2rayN/ServiceLib/Services/UpdateService.cs b/v2rayN/ServiceLib/Services/UpdateService.cs
index f25548ce687..09f103fa238 100644
--- a/v2rayN/ServiceLib/Services/UpdateService.cs
+++ b/v2rayN/ServiceLib/Services/UpdateService.cs
@@ -107,7 +107,7 @@ public async Task CheckUpdateCore(ECoreType type, Config config, Action<bool, st
                 _updateFunc?.Invoke(false, args.Msg);
 
                 url = args.Url;
-                var ext = Path.GetExtension(url);
+                var ext = url.Contains(".tar.gz") ? ".tar.gz" : Path.GetExtension(url);
                 fileName = Utils.GetTempPath(Utils.GetGuid() + ext);
                 await downloadHandle.DownloadFileAsync(url, fileName, true, _timeout);
             }
diff --git a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
index aac029733b8..b314c79bea6 100644
--- a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
@@ -66,15 +66,12 @@ private void RefreshSubItems()
                 CoreType = ECoreType.mihomo.ToString(),
                 Remarks = ResUI.menuCheckUpdate,
             });
-            if (Utils.IsWindows())
+            _checkUpdateItem.Add(new CheckUpdateItem()
             {
-                _checkUpdateItem.Add(new CheckUpdateItem()
-                {
-                    IsSelected = true,
-                    CoreType = ECoreType.sing_box.ToString(),
-                    Remarks = ResUI.menuCheckUpdate,
-                });
-            }
+                IsSelected = true,
+                CoreType = ECoreType.sing_box.ToString(),
+                Remarks = ResUI.menuCheckUpdate,
+            });
             _checkUpdateItem.Add(new CheckUpdateItem()
             {
                 IsSelected = true,
@@ -149,16 +146,6 @@ void _updateUI(bool success, string msg)
 
         private async Task CheckUpdateN(bool preRelease)
         {
-            ////Check for standalone windows .Net version
-            //if (Utils.IsWindows()
-            //    && File.Exists(Path.Combine(Utils.StartupPath(), "wpfgfx_cor3.dll"))
-            //    && File.Exists(Path.Combine(Utils.StartupPath(), "D3DCompiler_47_cor3.dll"))
-            //    )
-            //{
-            //    UpdateView(_v2rayN, ResUI.UpdateStandalonePackageTip);
-            //    return;
-            //}
-
             void _updateUI(bool success, string msg)
             {
                 UpdateView(_v2rayN, msg);
@@ -262,15 +249,24 @@ private void UpgradeCore()
                 {
                     continue;
                 }
-                string toPath = Utils.GetBinPath("", item.CoreType);
+                var toPath = Utils.GetBinPath("", item.CoreType);
 
                 if (fileName.Contains(".tar.gz"))
                 {
-                    //It's too complicated to unzip. TODO
+                    FileManager.DecompressTarFile(fileName, toPath);
+                    var dir = new DirectoryInfo(toPath);
+                    if (dir.Exists)
+                    {
+                        foreach (var subDir in dir.GetDirectories())
+                        {
+                            FileManager.CopyDirectory(subDir.FullName, toPath, false, null);
+                            subDir.Delete(true);
+                        }
+                    }
                 }
                 else if (fileName.Contains(".gz"))
                 {
-                    FileManager.UncompressedFile(fileName, toPath, item.CoreType);
+                    FileManager.DecompressFile(fileName, toPath, item.CoreType);
                 }
                 else
                 {
@@ -299,12 +295,10 @@ private void UpdateView(string coreType, string msg)
         public void UpdateViewResult(CheckUpdateItem item)
         {
             var found = _checkUpdateItem.FirstOrDefault(t => t.CoreType == item.CoreType);
-            if (found != null)
-            {
-                var itemCopy = JsonUtils.DeepCopy(found);
-                itemCopy.Remarks = item.Remarks;
-                _checkUpdateItem.Replace(found, itemCopy);
-            }
+            if (found == null) return;
+            var itemCopy = JsonUtils.DeepCopy(found);
+            itemCopy.Remarks = item.Remarks;
+            _checkUpdateItem.Replace(found, itemCopy);
         }
     }
 }
\ No newline at end of file