diff --git a/shadowsocks-csharp/Controller/ShadowsocksController.cs b/shadowsocks-csharp/Controller/ShadowsocksController.cs
index 1d2be8c9..f4ea1294 100644
--- a/shadowsocks-csharp/Controller/ShadowsocksController.cs
+++ b/shadowsocks-csharp/Controller/ShadowsocksController.cs
@@ -54,6 +54,12 @@ namespace Shadowsocks.Controller
             public string Path;
         }
 
+        public class UpdatedEventArgs : EventArgs
+        {
+            public string OldVersion;
+            public string NewVersion;
+        }
+
         public class TrafficPerSecond
         {
             public long inboundCounter;
@@ -80,6 +86,9 @@ namespace Shadowsocks.Controller
 
         public event ErrorEventHandler Errored;
 
+        // Invoked when controller.Start();
+        public event EventHandler<UpdatedEventArgs> ProgramUpdated;
+
         public ShadowsocksController()
         {
             _config = Configuration.Load();
@@ -88,10 +97,25 @@ namespace Shadowsocks.Controller
             _pluginsByServer = new ConcurrentDictionary<Server, Sip003Plugin>();
             StartReleasingMemory();
             StartTrafficStatistics(61);
+
+            ProgramUpdated += (o, e) =>
+            {
+                logger.Info($"Updated from {e.OldVersion} to {e.NewVersion}");
+            };
         }
 
         public void Start(bool regHotkeys = true)
         {
+            if (_config.updated && regHotkeys)
+            {
+                _config.updated = false;
+                ProgramUpdated.Invoke(this, new UpdatedEventArgs()
+                {
+                    OldVersion = _config.version,
+                    NewVersion = UpdateChecker.Version,
+                });
+                Configuration.Save(_config);
+            }
             Reload();
             if (regHotkeys)
             {
diff --git a/shadowsocks-csharp/Model/Configuration.cs b/shadowsocks-csharp/Model/Configuration.cs
index 200cd20c..9eb50a09 100644
--- a/shadowsocks-csharp/Model/Configuration.cs
+++ b/shadowsocks-csharp/Model/Configuration.cs
@@ -45,9 +45,14 @@ namespace Shadowsocks.Model
         NLogConfig nLogConfig;
 
         private static readonly string CONFIG_FILE = "gui-config.json";
+
+        [JsonIgnore]
+        public bool updated = false;
+
         [JsonIgnore]
         public string localHost => GetLocalHost();
-        private string GetLocalHost() {
+        private string GetLocalHost()
+        {
             return isIPv6Enabled ? "[::1]" : "127.0.0.1";
         }
         public Server GetCurrentServer()
@@ -86,6 +91,10 @@ namespace Shadowsocks.Model
                 string configContent = File.ReadAllText(CONFIG_FILE);
                 Configuration config = JsonConvert.DeserializeObject<Configuration>(configContent);
                 config.isDefault = false;
+                if (UpdateChecker.Asset.CompareVersion(UpdateChecker.Version, config.version ?? "0") > 0)
+                {
+                    config.updated = true;
+                }
 
                 if (config.configs == null)
                     config.configs = new List<Server>();
@@ -101,7 +110,8 @@ namespace Shadowsocks.Model
                     config.proxy = new ProxyConfig();
                 if (config.hotkey == null)
                     config.hotkey = new HotkeyConfig();
-                if (!System.Net.Sockets.Socket.OSSupportsIPv6) {
+                if (!System.Net.Sockets.Socket.OSSupportsIPv6)
+                {
                     config.isIPv6Enabled = false; // disable IPv6 if os not support
                 }
                 //TODO if remote host(server) do not support IPv6 (or DNS resolve AAAA TYPE record) disable IPv6?
diff --git a/shadowsocks-csharp/Program.cs b/shadowsocks-csharp/Program.cs
index 906ea685..e24ab322 100755
--- a/shadowsocks-csharp/Program.cs
+++ b/shadowsocks-csharp/Program.cs
@@ -30,7 +30,7 @@ namespace Shadowsocks
             Model.NLogConfig.TouchAndApplyNLogConfig();
 
             // .NET Framework 4.7.2 on Win7 compatibility
-            System.Net.ServicePointManager.SecurityProtocol |= 
+            System.Net.ServicePointManager.SecurityProtocol |=
                 System.Net.SecurityProtocolType.Tls | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12;
 
             // store args for further use
@@ -83,6 +83,7 @@ namespace Shadowsocks
                     return;
                 }
                 Directory.SetCurrentDirectory(Application.StartupPath);
+                
 #if DEBUG
                 // truncate privoxy log file while debugging
                 string privoxyLogFilename = Utils.GetTempPath("privoxy.log");
@@ -91,6 +92,7 @@ namespace Shadowsocks
 #endif
                 MainController = new ShadowsocksController();
                 MenuController = new MenuViewController(MainController);
+
                 HotKeys.Init(MainController);
                 MainController.Start();
                 Application.Run();
diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index 271f67ba..ddcf21f4 100644
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -374,7 +374,7 @@ namespace Shadowsocks.View
         {
             string argument = @"/select, " + e.Path;
 
-            System.Diagnostics.Process.Start("explorer.exe", argument);
+            Process.Start("explorer.exe", argument);
         }
 
         void ShowBalloonTip(string title, string content, ToolTipIcon icon, int timeout)
@@ -417,10 +417,10 @@ namespace Shadowsocks.View
             if (updateChecker.NewVersionFound)
             {
                 updateChecker.NewVersionFound = false; /* Reset the flag */
-                if (System.IO.File.Exists(updateChecker.LatestVersionLocalName))
+                if (File.Exists(updateChecker.LatestVersionLocalName))
                 {
                     string argument = "/select, \"" + updateChecker.LatestVersionLocalName + "\"";
-                    System.Diagnostics.Process.Start("explorer.exe", argument);
+                    Process.Start("explorer.exe", argument);
                 }
             }
         }
@@ -567,7 +567,12 @@ namespace Shadowsocks.View
             if (_isFirstRun)
             {
                 CheckUpdateForFirstRun();
-                ShowFirstTimeBalloon();
+                ShowBalloonTip(
+                    I18N.GetString("Shadowsocks is here"),
+                    I18N.GetString("You can turn on/off Shadowsocks in the context menu"),
+                    ToolTipIcon.Info,
+                    0
+                );
                 _isFirstRun = false;
             }
         }
@@ -606,14 +611,6 @@ namespace Shadowsocks.View
             updateChecker.CheckUpdate(config, 3000);
         }
 
-        private void ShowFirstTimeBalloon()
-        {
-            _notifyIcon.BalloonTipTitle = I18N.GetString("Shadowsocks is here");
-            _notifyIcon.BalloonTipText = I18N.GetString("You can turn on/off Shadowsocks in the context menu");
-            _notifyIcon.BalloonTipIcon = ToolTipIcon.Info;
-            _notifyIcon.ShowBalloonTip(0);
-        }
-
         private void AboutItem_Click(object sender, EventArgs e)
         {
             Process.Start("https://github.com/shadowsocks/shadowsocks-windows");