Workaround for Settings.Upgrade with Squirrel

App.xaml.cs

@@ -16,14 +16,7 @@ namespace ProcessCpuUsageStatusWindow
         [STAThread]
         public static void Main(string[] args)
         {
-            if (Settings.Default.FirstRun)
-            {
-                Settings.Default.Upgrade();
-                Settings.Default.FirstRun = false;
-                Settings.Default.Save();
-            }
-
-            SquirrelAwareApp.HandleEvents();
+            SquirrelAwareApp.HandleEvents(onAppUpdate: version => SettingsExtensions.RestoreSettings());
 
             var application = new App();
             application.InitializeComponent();

ProcessCpuUsageStatusWindow.csproj

@@ -88,6 +88,7 @@
       <HintPath>packages\squirrel.windows.1.7.9\lib\Net45\Squirrel.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Drawing" />
     <Reference Include="System.Windows.Interactivity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>packages\FloatingStatusWindow.1.0.0.9\lib\net45\System.Windows.Interactivity.dll</HintPath>
@@ -129,6 +130,7 @@
       <DependentUpon>App.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="SettingsExtensions.cs" />
     <Compile Include="WindowSource.cs" />
   </ItemGroup>
   <ItemGroup>

SettingsExtensions.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Configuration;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+
+namespace ProcessCpuUsageStatusWindow
+{
+    public static class SettingsExtensions
+    {
+        public static void BackupSettings()
+        {
+            Debugger.Launch();
+
+            var settingsFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath;
+            var destination = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + @"\..\last.config";
+            File.Copy(settingsFile, destination, true);
+        }
+
+        public static void RestoreSettings()
+        {
+            Debugger.Launch();
+
+            var destFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath;
+            var sourceFile = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + @"\..\last.config";
+
+            if (!File.Exists(sourceFile))
+                return;
+
+            var destDirectory = Path.GetDirectoryName(destFile);
+
+            if (destDirectory == null)
+                return;
+
+            try
+            {
+                Directory.CreateDirectory(destDirectory);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+            }
+
+            try
+            {
+                File.Copy(sourceFile, destFile, true);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+            }
+
+            try
+            {
+                File.Delete(sourceFile);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+            }
+        }
+    }
+}

WindowSource.cs

@@ -43,14 +43,14 @@ namespace ProcessCpuUsageStatusWindow
                         return;
 
                     _dispatcher.Invoke(() => _floatingStatusWindow.SetText(Resources.Updating));
-                    Thread.Sleep(1000);
+                    Thread.Sleep(500);
+
+                    SettingsExtensions.BackupSettings();
 
 #if !DEBUG
                     await updateManager.DownloadReleases(new[] { lastVersion });
                     await updateManager.ApplyReleases(updates);
                     await updateManager.UpdateApp();
-
-                    Thread.Sleep(1000);
 #endif
                 }