diff --git a/v2rayN/v2rayUpgrade/Program.cs b/v2rayN/v2rayUpgrade/Program.cs
index 0d057a96..8b9dfe4c 100644
--- a/v2rayN/v2rayUpgrade/Program.cs
+++ b/v2rayN/v2rayUpgrade/Program.cs
@@ -1,163 +1,22 @@
-using System.Diagnostics;
-using System.IO.Compression;
-using System.Runtime.InteropServices;
-using System.Text;
-
-namespace v2rayUpgrade
+namespace v2rayUpgrade
 {
     internal static class Program
     {
-        private static readonly string defaultFilename = "v2rayN.zip_temp";
-        private static string? fileName;
-
         /// <summary>
         /// 应用程序的主入口点。
         /// </summary>
         [STAThread]
         private static void Main(string[] args)
         {
-            if (args.Length > 0)
-            {
-                fileName = Uri.UnescapeDataString(string.Join(" ", args));
-            }
-            else
-            {
-                fileName = defaultFilename;
-            }
-            Console.WriteLine(fileName);
-            Console.WriteLine("In progress, please wait...(正在进行中，请等待)");
-
-            Thread.Sleep(5000);
-
-            try
-            {
-                Process[] existing = Process.GetProcessesByName(V2rayN());
-                foreach (Process p in existing)
-                {
-                    var path = p.MainModule?.FileName ?? "";
-                    if (path.StartsWith(GetPath(V2rayN())))
-                    {
-                        p.Kill();
-                        p.WaitForExit(100);
-                    }
-                }
-            }
-            catch (Exception ex)
-            {
-                // Access may be denied without admin right. The user may not be an administrator.
-                Console.WriteLine("Failed to close v2rayN(关闭v2rayN失败).\n" +
-                    "Close it manually, or the upgrade may fail.(请手动关闭正在运行的v2rayN，否则可能升级失败。\n\n" + ex.StackTrace);
-            }
-
-            if (!File.Exists(fileName))
-            {
-                if (File.Exists(defaultFilename))
-                {
-                    fileName = defaultFilename;
-                }
-                else
-                {
-                    Console.WriteLine("Upgrade Failed, File Not Exist(升级失败,文件不存在).");
-                    return;
-                }
-            }
-
-            StringBuilder sb = new();
-            try
-            {
-                string thisAppOldFile = $"{GetExePath()}.tmp";
-                File.Delete(thisAppOldFile);
-                string splitKey = "/";
-
-                using ZipArchive archive = ZipFile.OpenRead(fileName);
-                foreach (ZipArchiveEntry entry in archive.Entries)
-                {
-                    try
-                    {
-                        if (entry.Length == 0)
-                        {
-                            continue;
-                        }
-
-                        var lst = entry.FullName.Split(splitKey);
-                        if (lst.Length == 1) continue;
-                        string fullName = string.Join(splitKey, lst[1..lst.Length]);
-
-                        if (string.Equals(GetExePath(), GetPath(fullName), StringComparison.OrdinalIgnoreCase))
-                        {
-                            File.Move(GetExePath(), thisAppOldFile);
-                        }
-
-                        string entryOutputPath = GetPath(fullName);
-                        Directory.CreateDirectory(Path.GetDirectoryName(entryOutputPath)!);
-                        entry.ExtractToFile(entryOutputPath, true);
-
-                        Console.WriteLine(entryOutputPath);
-                    }
-                    catch (Exception ex)
-                    {
-                        sb.Append(ex.StackTrace);
-                    }
-                }
-            }
-            catch (Exception ex)
+            if (args.Length == 0)
             {
-                Console.WriteLine("Upgrade Failed(升级失败)." + ex.StackTrace);
+                Console.WriteLine("Please run it from the main application.(请从主应用运行)");
+                Thread.Sleep(5000);
                 return;
             }
-            if (sb.Length > 0)
-            {
-                Console.WriteLine("Upgrade Failed.\n" +
-                    "(升级失败)." + sb.ToString());
-                return;
-            }
-
-            Console.WriteLine("Start v2rayN, please wait...(正在重启，请等待)");
-            Thread.Sleep(3000);
-            Process process = new()
-            {
-                StartInfo = new()
-                {
-                    FileName = V2rayN(),
-                    WorkingDirectory = StartupPath()
-                }
-            };
-            process.Start();
-        }
-
-        public static string GetExePath()
-        {
-            return Environment.ProcessPath ?? string.Empty;
-        }
-
-        public static string StartupPath()
-        {
-            return AppDomain.CurrentDomain.BaseDirectory;
-        }
-
-        public static string GetPath(string fileName)
-        {
-            string startupPath = StartupPath();
-            if (string.IsNullOrEmpty(fileName))
-            {
-                return startupPath;
-            }
-            return Path.Combine(startupPath, fileName);
-        }
 
-        private static string V2rayN()
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                if (File.Exists(GetPath("v2rayN.exe")))
-                    return "v2rayN";
-                else
-                    return "v2rayN.Desktop";
-            }
-            else
-            {
-                return "v2rayN.Desktop";
-            }
+            var fileName = Uri.UnescapeDataString(string.Join(" ", args));
+            Upgrade.UpgradeApp(fileName);
         }
     }
 }
\ No newline at end of file
diff --git a/v2rayN/v2rayUpgrade/Upgrade.cs b/v2rayN/v2rayUpgrade/Upgrade.cs
new file mode 100644
index 00000000..ef627f10
--- /dev/null
+++ b/v2rayN/v2rayUpgrade/Upgrade.cs
@@ -0,0 +1,141 @@
+using System.Diagnostics;
+using System.IO.Compression;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace v2rayUpgrade
+{
+    internal class Upgrade
+    {
+        public static void UpgradeApp(string fileName)
+        {
+            Console.WriteLine(fileName);
+            Console.WriteLine("In progress, please wait...(正在进行中，请等待)");
+
+            Thread.Sleep(5000);
+
+            if (!File.Exists(fileName))
+            {
+                Console.WriteLine("Upgrade Failed, File Not Exist(升级失败,文件不存在).");
+                return;
+            }
+
+            try
+            {
+                Process[] existing = Process.GetProcessesByName(V2rayN());
+                foreach (Process p in existing)
+                {
+                    var path = p.MainModule?.FileName ?? "";
+                    if (path.StartsWith(GetPath(V2rayN())))
+                    {
+                        p.Kill();
+                        p.WaitForExit(100);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                // Access may be denied without admin right. The user may not be an administrator.
+                Console.WriteLine("Failed to close v2rayN(关闭v2rayN失败).\n" +
+                    "Close it manually, or the upgrade may fail.(请手动关闭正在运行的v2rayN，否则可能升级失败。\n\n" + ex.StackTrace);
+            }
+
+            StringBuilder sb = new();
+            try
+            {
+                string thisAppOldFile = $"{GetExePath()}.tmp";
+                File.Delete(thisAppOldFile);
+                string splitKey = "/";
+
+                using ZipArchive archive = ZipFile.OpenRead(fileName);
+                foreach (ZipArchiveEntry entry in archive.Entries)
+                {
+                    try
+                    {
+                        if (entry.Length == 0)
+                        {
+                            continue;
+                        }
+
+                        var lst = entry.FullName.Split(splitKey);
+                        if (lst.Length == 1) continue;
+                        string fullName = string.Join(splitKey, lst[1..lst.Length]);
+
+                        if (string.Equals(GetExePath(), GetPath(fullName), StringComparison.OrdinalIgnoreCase))
+                        {
+                            File.Move(GetExePath(), thisAppOldFile);
+                        }
+
+                        string entryOutputPath = GetPath(fullName);
+                        Directory.CreateDirectory(Path.GetDirectoryName(entryOutputPath)!);
+                        entry.ExtractToFile(entryOutputPath, true);
+
+                        Console.WriteLine(entryOutputPath);
+                    }
+                    catch (Exception ex)
+                    {
+                        sb.Append(ex.StackTrace);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Upgrade Failed(升级失败)." + ex.StackTrace);
+                return;
+            }
+            if (sb.Length > 0)
+            {
+                Console.WriteLine("Upgrade Failed.\n" +
+                    "(升级失败)." + sb.ToString());
+                return;
+            }
+
+            Console.WriteLine("Start v2rayN, please wait...(正在重启，请等待)");
+            Thread.Sleep(3000);
+            Process process = new()
+            {
+                StartInfo = new()
+                {
+                    FileName = V2rayN(),
+                    WorkingDirectory = StartupPath()
+                }
+            };
+            process.Start();
+        }
+
+        private static string GetExePath()
+        {
+            return Environment.ProcessPath ?? string.Empty;
+        }
+
+        private static string StartupPath()
+        {
+            return AppDomain.CurrentDomain.BaseDirectory;
+        }
+
+        private static string GetPath(string fileName)
+        {
+            string startupPath = StartupPath();
+            if (string.IsNullOrEmpty(fileName))
+            {
+                return startupPath;
+            }
+            return Path.Combine(startupPath, fileName);
+        }
+
+        private static string V2rayN()
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                if (File.Exists(GetPath("v2rayN.exe")))
+                    return "v2rayN";
+                else
+                    return "v2rayN.Desktop";
+            }
+            else
+            {
+                return "v2rayN.Desktop";
+            }
+        }
+    }
+}
\ No newline at end of file