diff --git a/source/Funbit.Ets.Telemetry.Server/App.config b/source/Funbit.Ets.Telemetry.Server/App.config
index f36dc92e..190208d6 100644
--- a/source/Funbit.Ets.Telemetry.Server/App.config
+++ b/source/Funbit.Ets.Telemetry.Server/App.config
@@ -2,9 +2,6 @@
 <configuration>
   <configSections>
     <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
-    <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
-      <section name="Funbit.Ets.Telemetry.Server.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
-    </sectionGroup>
   </configSections>
   <appSettings>
     <!-- ============================================================================== -->
@@ -68,11 +65,4 @@
       </providers>
     </roleManager>
   </system.web>
-  <userSettings>
-    <Funbit.Ets.Telemetry.Server.Properties.Settings>
-      <setting name="Lang" serializeAs="String">
-        <value>0</value>
-      </setting>
-    </Funbit.Ets.Telemetry.Server.Properties.Settings>
-  </userSettings>
 </configuration>
\ No newline at end of file
diff --git a/source/Funbit.Ets.Telemetry.Server/Helpers/Settings.cs b/source/Funbit.Ets.Telemetry.Server/Helpers/Settings.cs
index 40844c60..6228b5ed 100644
--- a/source/Funbit.Ets.Telemetry.Server/Helpers/Settings.cs
+++ b/source/Funbit.Ets.Telemetry.Server/Helpers/Settings.cs
@@ -15,6 +15,7 @@ public class Settings
 
         public bool FirewallSetupHadErrors { get; set; }
         public bool UrlReservationSetupHadErrors { get; set; }
+        public string LastLang { get; set; }
 
         #endregion
 
diff --git a/source/Funbit.Ets.Telemetry.Server/MainForm.cs b/source/Funbit.Ets.Telemetry.Server/MainForm.cs
index 081d38f8..70f9b5e6 100644
--- a/source/Funbit.Ets.Telemetry.Server/MainForm.cs
+++ b/source/Funbit.Ets.Telemetry.Server/MainForm.cs
@@ -154,6 +154,11 @@ void Start()
         
         void MainForm_Load(object sender, EventArgs e)
         {
+            // Check Last Settings
+            Thread.CurrentThread.CurrentUICulture = new CultureInfo(Settings.Instance.LastLang);
+            // Apply Locale
+            FormInitialize();
+
             // log current version for debugging
             Log.InfoFormat("{0} ({1}) {2}", Environment.OSVersion, 
                 Environment.Is64BitOperatingSystem ? "64" + StringLib.CurrentVersion_Bit : "32" + StringLib.CurrentVersion_Bit,
@@ -164,19 +169,6 @@ void MainForm_Load(object sender, EventArgs e)
             Setup();
 
             Start();
-
-            // Check Last Settings
-            if (Properties.Settings.Default.Lang == 0)
-            {
-                Lang_ko_ToolStripMenuItem.PerformClick();
-            }
-            else if (Properties.Settings.Default.Lang == 1)
-            {
-                Lang_en_ToolStripMenuItem.PerformClick();
-            }
-
-            // Apply Locale
-            FormInitialize();
         }
 
         void MainForm_FormClosed(object sender, FormClosedEventArgs e)
@@ -326,17 +318,21 @@ private void TranslateToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void Lang_ko_ToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Thread.CurrentThread.CurrentUICulture = new CultureInfo("ko");
-            Properties.Settings.Default.Lang = 0;
-            Properties.Settings.Default.Save();
-            FormInitialize();
+            ChangeLang("ko", Lang_ko_ToolStripMenuItem.Text);
         }
 
         private void Lang_en_ToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Thread.CurrentThread.CurrentUICulture = new CultureInfo("en");
-            Properties.Settings.Default.Lang = 1;
-            Properties.Settings.Default.Save();
+            ChangeLang("en", Lang_en_ToolStripMenuItem.Text);
+        }
+
+        private void ChangeLang(string lang, string lang_button)
+        {
+            Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);
+            Settings.Instance.LastLang = lang;
+            Settings.Instance.Save();
+            MessageBox.Show(StringLib.Settings_Lang_LogInfo, StringLib.Information, MessageBoxButtons.OK ,MessageBoxIcon.Information);
+            Log.InfoFormat(StringLib.Settings_Lang_1 + lang_button + StringLib.Settings_Lang_2);
             FormInitialize();
         }
     }
diff --git a/source/Funbit.Ets.Telemetry.Server/Properties/Settings.Designer.cs b/source/Funbit.Ets.Telemetry.Server/Properties/Settings.Designer.cs
index dd5d3e2f..9152b00b 100644
--- a/source/Funbit.Ets.Telemetry.Server/Properties/Settings.Designer.cs
+++ b/source/Funbit.Ets.Telemetry.Server/Properties/Settings.Designer.cs
@@ -22,17 +22,5 @@ public static Settings Default {
                 return defaultInstance;
             }
         }
-        
-        [global::System.Configuration.UserScopedSettingAttribute()]
-        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("0")]
-        public int Lang {
-            get {
-                return ((int)(this["Lang"]));
-            }
-            set {
-                this["Lang"] = value;
-            }
-        }
     }
 }
diff --git a/source/Funbit.Ets.Telemetry.Server/Properties/Settings.settings b/source/Funbit.Ets.Telemetry.Server/Properties/Settings.settings
index 2a31e518..8e615f25 100644
--- a/source/Funbit.Ets.Telemetry.Server/Properties/Settings.settings
+++ b/source/Funbit.Ets.Telemetry.Server/Properties/Settings.settings
@@ -1,9 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)" GeneratedClassNamespace="Funbit.Ets.Telemetry.Server.Properties" GeneratedClassName="Settings">
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
   <Profiles />
-  <Settings>
-    <Setting Name="Lang" Type="System.Int32" Scope="User">
-      <Value Profile="(Default)">0</Value>
-    </Setting>
-  </Settings>
+  <Settings />
 </SettingsFile>
\ No newline at end of file