removed unused code

EZPPClient Installer/EZPPClient Installer.csproj

@@ -90,13 +90,14 @@
       <DependentUpon>App.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="MD5File.cs" />
-    <Compile Include="DownloadUtil.cs" />
-    <Compile Include="MD5Util.cs" />
-    <Compile Include="ProcessUtil.cs" />
-    <Compile Include="Shortcut.cs" />
-    <Compile Include="UpdateState.cs" />
-    <Compile Include="Util.cs" />
+    <Compile Include="Objects\MD5File.cs" />
+    <Compile Include="Utils\DownloadUtil.cs" />
+    <Compile Include="Utils\MD5Util.cs" />
+    <Compile Include="Utils\ProcessUtil.cs" />
+    <Compile Include="Utils\RegistryUtil.cs" />
+    <Compile Include="Utils\ReleaseStreamUtil.cs" />
+    <Compile Include="Objects\UpdateState.cs" />
+    <Compile Include="Utils\OsuUtil.cs" />
     <Compile Include="MainWindow.xaml.cs">
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
@@ -136,8 +137,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="DK.WshRuntime">
-      <Version>4.1.3.201115164</Version>
+    <PackageReference Include="DK.Standard">
+      <Version>4.137.4070.201115155</Version>
     </PackageReference>
     <PackageReference Include="ModernWpfUI">
       <Version>0.9.4</Version>
@@ -149,5 +150,16 @@
   <ItemGroup>
     <Content Include=".gitignore" />
   </ItemGroup>
+  <ItemGroup>
+    <COMReference Include="IWshRuntimeLibrary">
+      <Guid>{F935DC20-1CF0-11D0-ADB9-00C04FD58A0B}</Guid>
+      <VersionMajor>1</VersionMajor>
+      <VersionMinor>0</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>tlbimp</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

EZPPClient Installer/MainWindow.xaml

@@ -5,17 +5,20 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:EZPPClient_Installer"
         mc:Ignorable="d"
-        Title="EZPPClient Installer" Height="232.051" Width="525.487"
+        Title="EZPPClient Installer" Height="293.333" Width="525"
         xmlns:ui="http://schemas.modernwpf.com/2019"
     ui:WindowHelper.UseModernWindowStyle="True" ResizeMode="CanMinimize" Icon="circle_new.ico" Topmost="True" WindowStartupLocation="CenterScreen">
     <ui:SimpleStackPanel Margin="12" Spacing="24">
-        <CheckBox x:Name="linkFoldersCheckbox" Content="Link Song and Skins Folder" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="150,62,150,-62" IsChecked="True" />
-        <TextBox x:Name="folderTextbox" HorizontalAlignment="Left" Height="32" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="422" Margin="10,-34,0,0" IsReadOnly="true"/>
-        <Button x:Name="InstallButton" Content="Install" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Bottom" Margin="176,0,176,-58" Style="{StaticResource AccentButtonStyle}" Click="Install_Click"/>
-        <Button x:Name="BrowseButton" Content="..." HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="437,-82,10,0" Click="Browse_Click"/>
-        <Button x:Name="Uninstall_Button" Content="Uninstall" HorizontalAlignment="Stretch" Height="31" VerticalAlignment="Bottom" Margin="176,0,176,-47" Click="Uninstall_Button_Click" Background="#CCCB3737" Foreground="White" Visibility="Hidden"/>
-        <ProgressBar x:Name="Download_Progressbar" Height="1" VerticalAlignment="Top" Margin="15,-34,15,0" IsIndeterminate="True" Visibility="Hidden"/>
-        <Label x:Name="Download_Text" Content="Downloading: " Height="19" VerticalAlignment="Top" Margin="10,-82,10,0" Visibility="Hidden"/>
-        <TextBlock Margin="349,-47,0,24"><Hyperlink NavigateUri="https://ez-pp.farm" RequestNavigate="Hyperlink_RequestNavigate"><Run Text="Copyright @ EZPPFarm"/></Hyperlink></TextBlock>
+        <CheckBox x:Name="linkFoldersCheckbox" Content="Link Song and Skins Folder" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="150,125,150,-125" IsChecked="True" />
+        <TextBox x:Name="folderTextbox" HorizontalAlignment="Left" Height="32" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="422" Margin="10,-27,0,-5" IsReadOnly="true"/>
+        <Button x:Name="InstallButton" Content="Install" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Bottom" Margin="176,0,176,-114" Style="{StaticResource AccentButtonStyle}" Click="Install_Click"/>
+        <Button x:Name="BrowseButton" Content="..." HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="437,-75,10,0" Click="Browse_Click"/>
+        <Button x:Name="Uninstall_Button" Content="Uninstall" HorizontalAlignment="Stretch" Height="31" VerticalAlignment="Bottom" Margin="176,0,176,-100" Click="Uninstall_Button_Click" Foreground="White" Visibility="Hidden" IsCancel="True"/>
+        <ProgressBar x:Name="Download_Progressbar" Height="1" VerticalAlignment="Top" Margin="15,22,15,-26" IsIndeterminate="True" Visibility="Hidden"/>
+        <Label x:Name="Download_Text" Content="Downloading: " Height="19" VerticalAlignment="Top" Margin="10,-26,10,0" Visibility="Hidden"/>
+        <TextBlock Margin="349,14,0,-37"><Hyperlink NavigateUri="https://ez-pp.farm" RequestNavigate="Hyperlink_RequestNavigate"><Run Text="Copyright @ EZPPFarm"/></Hyperlink></TextBlock>
+        <ComboBox x:Name="ReleaseStreamComboBox" HorizontalAlignment="Left" Height="31" VerticalAlignment="Top" Width="475" Margin="10,-137,0,0" ClipToBounds="True" SelectionChanged="ReleaseStreamComboBox_SelectionChanged"/>
+        <Label x:Name="ReleaseStreamLabel" Content="Release:" HorizontalAlignment="Left" Height="19" VerticalAlignment="Top" Width="145" Margin="10,-181,0,0"/>
+        <Label Content="Path to osu! Folder:" HorizontalAlignment="Left" Height="19" VerticalAlignment="Top" Width="145" Margin="10,-263,0,0"/>
     </ui:SimpleStackPanel>
 </Window>

EZPPClient Installer/MainWindow.xaml.cs

@@ -13,8 +13,13 @@ using ModernWpf.Controls;
 using System.Windows.Forms;
 using System.Media;
 using System.Runtime.InteropServices.ComTypes;
-using Shortcut;
 using Path = System.Windows.Shapes.Path;
+using File = System.IO.File;
+using EZPPClient_Installer.Utils;
+using Microsoft.Win32;
+using System.Windows.Controls;
+using System.Threading;
+using IWshRuntimeLibrary;
 
 #if DEBUG
 using MessageBox = System.Windows.MessageBox;
@@ -35,6 +40,8 @@ namespace EZPPClient_Installer
 
     private static double VERSION = 1.6;
 
+    public static string RELEASESTREAM;
+
     public MainWindow()
     {
       Instance = this;
@@ -62,7 +69,9 @@ namespace EZPPClient_Installer
       string versionString = "v" + VERSION;
       InstallerWindow.Title = "EZPPClient Installer " + versionString.Replace(",", ".");
 
-      string osuPath = Util.osuInstallDir();
+      await FetchReleaseStreams();
+
+      string osuPath = OsuUtil.osuInstallDir();
 
       if (osuPath.EndsWith(@"\EZPPClient"))
       {
@@ -83,7 +92,7 @@ namespace EZPPClient_Installer
           UpdateInstallButton(false);
 
 
-          List<string> outdatedFiles = DownloadUtil.FilesToDownload(osuEZPPPath, false);
+          List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
 
           if (!IsEmpty(outdatedFiles))
           {
@@ -105,6 +114,22 @@ namespace EZPPClient_Installer
 
     }
 
+    private async Task FetchReleaseStreams()
+    {
+      List<string> releases = await ReleaseStreamUtil.GetAvailableReleaseStreams();
+      foreach(string release in releases)
+      {
+        ReleaseStreamComboBox.Items.Add(release.UppercaseFirst().Trim());
+      }
+
+      string systemRelease = RegistryUtil.GetUsedReleaseStream("Stable");
+
+      bool containsRelease = releases.Contains(systemRelease);
+
+      ReleaseStreamComboBox.SelectedValue = systemRelease;
+     
+    }
+
     private async Task<UpdateState> CheckForInstallerUpdates()
     {
 #if !DEBUG
@@ -113,7 +138,7 @@ namespace EZPPClient_Installer
         using (WebClient client = new WebClient())
         {
           client.Headers.Add("user-agent", "EZPPClientInstaller");
-          string newVersionString = client.DownloadString("https://new.ez-pp.farm/ezppclient?version");
+          string newVersionString = await client.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?version");
           double ver = 0;
           try
           {
@@ -188,6 +213,10 @@ namespace EZPPClient_Installer
         return;
       }
 
+      var type = InstallButton.Content;
+
+      RegistryUtil.SetUsedReleaseStream(RELEASESTREAM);
+
       if (!Directory.Exists(osuFolder + "\\EZPPClient"))
       {
         Directory.CreateDirectory(osuFolder + "\\EZPPClient");
@@ -264,7 +293,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\osu!.{1}.cfg", osuFolder, userName), string.Format(@"{0}\osu!.{1}.cfg", EZPPFolder, userName));
             if (!CreateSymbolicLink(string.Format(@"{0}\osu!.{1}.cfg", EZPPFolder, userName), string.Format(@"{0}\osu!.{1}.cfg", osuFolder, userName), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -291,7 +319,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\scores.db", osuFolder), string.Format(@"{0}\scores.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\scores.db", EZPPFolder), string.Format(@"{0}\scores.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -318,7 +345,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\collection.db", osuFolder), string.Format(@"{0}\collection.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\collection.db", EZPPFolder), string.Format(@"{0}\collection.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -345,7 +371,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\osu.db", osuFolder), string.Format(@"{0}\osu.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\osu!.db", EZPPFolder), string.Format(@"{0}\osu!.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -372,7 +397,7 @@ namespace EZPPClient_Installer
 
 
 
-      List<string> filesToDownload = DownloadUtil.FilesToDownload(EZPPFolder, InstallButton.Content.Equals("Reinstall"));
+      List<string> filesToDownload = await DownloadUtil.FilesToDownload(EZPPFolder, InstallButton.Content.Equals("Reinstall"));
 
       Visibility prevInstallBtnVis = InstallButton.Visibility;
       Visibility prevUninstallBtnVis = Uninstall_Button.Visibility;
@@ -382,32 +407,46 @@ namespace EZPPClient_Installer
       InstallButton.Visibility = Visibility.Hidden;
       Uninstall_Button.Visibility = Visibility.Hidden;
       linkFoldersCheckbox.Visibility = Visibility.Hidden;
+      ReleaseStreamComboBox.IsEnabled = false;
 
       Download_Text.Visibility = Visibility.Visible;
       Download_Progressbar.Visibility = Visibility.Visible;
 
       await DownloadUtil.DownloadFiles(filesToDownload, EZPPFolder);
 
-      if (InstallButton.Content.Equals("Install"))
+      if (type.Equals("Install"))
       {
-        IShellLink link = (IShellLink)new ShellLink();
-
-        // setup shortcut information
-        link.SetDescription("Starts the EZPPClient");
-        link.SetPath(EZPPFolder + @"\EZPPClient.exe");
-
-        // save it
-        IPersistFile file = (IPersistFile)link;
         string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
-        string LinkFile = System.IO.Path.Combine(desktopPath, "Start EZPPClient.lnk");
-        Console.Out.WriteLine("Saving Shortcut to " + LinkFile);
-        file.Save(LinkFile, false);
+        string desktopLinkFile = System.IO.Path.Combine(desktopPath, "Start EZPPClient.lnk");
+
+        string startMenuPath = Environment.GetFolderPath(Environment.SpecialFolder.StartMenu);
+        string startMenuPathPrograms = System.IO.Path.Combine(startMenuPath, "Programs");
+        string startMenuLinkFile = System.IO.Path.Combine(startMenuPathPrograms, "Start EZPPClient.lnk");
+
+        if (!File.Exists(desktopLinkFile))
+        {
+          WshShell shell = new WshShell();
+          IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(desktopLinkFile);
+          shortcut.Description = $"Starts the EZPPClient";
+          shortcut.TargetPath = System.IO.Path.Combine(EZPPFolder, "EZPPClient.exe");
+          shortcut.Save();
+        }
+
+        if (!File.Exists(startMenuLinkFile))
+        {
+          WshShell shell = new WshShell();
+          IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(startMenuLinkFile);
+          shortcut.Description = $"Starts the EZPPClient";
+          shortcut.TargetPath = System.IO.Path.Combine(EZPPFolder, "EZPPClient.exe");
+          shortcut.Save();
+        }
       }
 
       InstallButton.Visibility = prevInstallBtnVis;
       Uninstall_Button.Visibility = prevUninstallBtnVis;
       linkFoldersCheckbox.Visibility = prevLinkFCVis;
       BrowseButton.IsEnabled = true;
+      ReleaseStreamComboBox.IsEnabled = true;
 
       Download_Text.Visibility = Visibility.Hidden;
       Download_Progressbar.Visibility = Visibility.Hidden;
@@ -415,7 +454,7 @@ namespace EZPPClient_Installer
       Uninstall_Button.Visibility = Visibility.Visible;
       UpdateInstallButton(false);
       
-      List<string> outdatedFiles = DownloadUtil.FilesToDownload(EZPPFolder, false);
+      List<string> outdatedFiles = await DownloadUtil.FilesToDownload(EZPPFolder, false);
 
       if (!IsEmpty(outdatedFiles))
       {
@@ -424,7 +463,7 @@ namespace EZPPClient_Installer
         linkFoldersCheckbox.IsEnabled = false;
         string updateText = "It seems like the installation was faulty, please hit Update to repair the EZPPClient.";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "It seems like the update was faulty, please hit Update to repair the EZPPClient.";
@@ -447,7 +486,7 @@ namespace EZPPClient_Installer
       {
         string updateText = "The EZPPClient was successfully installed!";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "The EZPPClient was successfully updated!";
@@ -509,7 +548,7 @@ namespace EZPPClient_Installer
               UpdateInstallButton(false);
 
               string osuEZPPPath = folderTextbox.Text + @"\EZPPClient";
-              List<string> outdatedFiles = DownloadUtil.FilesToDownload(osuEZPPPath, false);
+              List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
 
               if (!IsEmpty(outdatedFiles))
               {
@@ -557,11 +596,18 @@ namespace EZPPClient_Installer
         if (Directory.Exists(osuEZPPPath))
           Directory.Delete(osuEZPPPath, true);
 
+        
         string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
         string linkFile = System.IO.Path.Combine(desktopPath, "Start EZPPClient.lnk");
         if (File.Exists(linkFile))
           File.Delete(linkFile);
 
+        string startMenuPath = Environment.GetFolderPath(Environment.SpecialFolder.StartMenu);
+        string startMenuPathPrograms = System.IO.Path.Combine(startMenuPath, "Programs");
+        string startMenuLinkFile = System.IO.Path.Combine(startMenuPathPrograms, "Start EZPPClient.lnk");
+        if (File.Exists(startMenuLinkFile))
+          File.Delete(startMenuLinkFile);
+
         _ = new ContentDialog()
         {
           Title = "Success!",
@@ -634,5 +680,63 @@ namespace EZPPClient_Installer
       Instance.Download_Progressbar.Value = progress;
       Instance.Download_Text.Content = "Downloading: " + file;
     }
+
+    private async void ReleaseStreamComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
+    {
+
+      bool init = string.IsNullOrEmpty(RELEASESTREAM);
+
+      RELEASESTREAM = (string)ReleaseStreamComboBox.SelectedValue;
+
+      if (init)
+        return;
+
+      ReleaseStreamComboBox.IsEnabled = false;
+      BrowseButton.IsEnabled = false;
+      InstallButton.IsEnabled = false;
+      Uninstall_Button.IsEnabled = false;
+
+      string osuPath = folderTextbox.Text;
+
+      bool isValidFolder = await isValidOsuFolder(osuPath);
+      UpdateInstallButton(!string.IsNullOrEmpty(osuPath));
+
+      if (!string.IsNullOrEmpty(osuPath) && isValidFolder)
+      {
+        bool foundInstall = isEZPPClientInstallationFound(osuPath);
+        if (foundInstall)
+        {
+          string osuEZPPPath = osuPath + @"\EZPPClient";
+
+          Uninstall_Button.Visibility = Visibility.Visible;
+          UpdateInstallButton(false);
+
+
+          List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
+
+          if (!IsEmpty(outdatedFiles))
+          {
+            UpdateInstallButton(true);
+            InstallButton.Content = "Update";
+            linkFoldersCheckbox.IsEnabled = false;
+          }
+        }
+
+        folderTextbox.Text = osuPath;
+      }
+
+      _ = new ContentDialog()
+      {
+        Title = "Success!",
+        Content = "ReleaseStream changed to " + RELEASESTREAM,
+        PrimaryButtonText = "Okay"
+      }.ShowAsync();
+
+      ReleaseStreamComboBox.IsEnabled = true;
+      BrowseButton.IsEnabled = true;
+      InstallButton.IsEnabled = true;
+      Uninstall_Button.IsEnabled = true;
+
+    }
   }
 }

EZPPClient Installer/Models/MD5File.cs

@@ -10,24 +10,14 @@ namespace EZPPClient_Installer
   class MD5File
   {
 
-    private string md5;
-    private string name;
+    public string MD5 { get; set; }
+
+    public string Name { get; set; }
 
     public MD5File(string name, string md5)
     {
-      this.md5 = md5;
-      this.name = name;
+      this.MD5 = md5;
+      this.Name = name;
     }
-
-    public string getName()
-    {
-      return name;
-    }
-
-    public string getMD5()
-    {
-      return md5;
-    }
-
   }
 }

EZPPClient Installer/Shortcut.cs

@@ -1,39 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Runtime.InteropServices.ComTypes;
-using System.Text;
-
-namespace Shortcut
-{
-    [ComImport]
-    [Guid("00021401-0000-0000-C000-000000000046")]
-    internal class ShellLink
-    {
-    }
-
-    [ComImport]
-    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-    [Guid("000214F9-0000-0000-C000-000000000046")]
-    internal interface IShellLink
-    {
-        void GetPath([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszFile, int cchMaxPath, out IntPtr pfd, int fFlags);
-        void GetIDList(out IntPtr ppidl);
-        void SetIDList(IntPtr pidl);
-        void GetDescription([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszName, int cchMaxName);
-        void SetDescription([MarshalAs(UnmanagedType.LPWStr)] string pszName);
-        void GetWorkingDirectory([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszDir, int cchMaxPath);
-        void SetWorkingDirectory([MarshalAs(UnmanagedType.LPWStr)] string pszDir);
-        void GetArguments([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszArgs, int cchMaxPath);
-        void SetArguments([MarshalAs(UnmanagedType.LPWStr)] string pszArgs);
-        void GetHotkey(out short pwHotkey);
-        void SetHotkey(short wHotkey);
-        void GetShowCmd(out int piShowCmd);
-        void SetShowCmd(int iShowCmd);
-        void GetIconLocation([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszIconPath, int cchIconPath, out int piIcon);
-        void SetIconLocation([MarshalAs(UnmanagedType.LPWStr)] string pszIconPath, int iIcon);
-        void SetRelativePath([MarshalAs(UnmanagedType.LPWStr)] string pszPathRel, int dwReserved);
-        void Resolve(IntPtr hwnd, int fFlags);
-        void SetPath([MarshalAs(UnmanagedType.LPWStr)] string pszFile);
-    }
-}

EZPPClient Installer/Utils/DownloadUtil.cs

@@ -12,7 +12,7 @@ namespace EZPPClient_Installer
   public class DownloadUtil
   {
 
-    public static List<string> FilesToDownload(string pathToEZPP, bool reinstall)
+    public static async Task<List<string>> FilesToDownload(string pathToEZPP, bool reinstall)
     {
       bool directoryExists = Directory.Exists(pathToEZPP);
 
@@ -21,15 +21,14 @@ namespace EZPPClient_Installer
 
       try
       {
-
         using (WebClient wc = new WebClient())
         {
           wc.Headers.Add("user-agent", "EZPPClientInstaller");
-          var data = wc.DownloadString("https://new.ez-pp.farm/ezppclient?list");
+          var data = await wc.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?list&release=" + MainWindow.RELEASESTREAM.ToLower());
           string[] dataList = data.Split('\n');
           foreach (string datastring in dataList)
           {
-            if (string.IsNullOrWhiteSpace(datastring))
+            if (string.IsNullOrWhiteSpace(datastring) || !datastring.Contains("#"))
               continue;
             
             string[] se = datastring.Split('#');
@@ -41,7 +40,7 @@ namespace EZPPClient_Installer
       }
       catch (WebException error)
       {
-        new ContentDialog()
+        _ = new ContentDialog()
         {
           Title = "Oops...",
           Content = "A error occurred while trying to fetch all needed Files.\n" + error.Message,
@@ -55,28 +54,28 @@ namespace EZPPClient_Installer
         MessageBox.Show("Folder does not exist: " + pathToEZPP);
 #endif
         foreach (MD5File md5File in md5Files)
-          downloadList.Add(md5File.getName());
+          downloadList.Add(md5File.Name);
       }
       else
       {
         foreach (MD5File md5file in md5Files)
         {
-          string file = pathToEZPP + @"\" + md5file.getName();
+          string file = pathToEZPP + @"\" + md5file.Name;
           bool doesExistOnPC = File.Exists(file);
           if (!doesExistOnPC)
           {
-            downloadList.Add(md5file.getName());
+            downloadList.Add(md5file.Name);
           }
           else
           {
-            string onlineHash = md5file.getMD5();
+            string onlineHash = md5file.MD5;
             string pcHash = MD5Util.CalculateMD5(file);
 #if DEBUG
-            MessageBox.Show("Filename: " + md5file.getName() + "\nOnline-Hash: " + onlineHash + "\n PC-Hash: " + pcHash);
+            MessageBox.Show("Filename: " + md5file.Name + "\nOnline-Hash: " + onlineHash + "\n PC-Hash: " + pcHash);
 #endif
             if (!string.Equals(onlineHash, pcHash))
             {
-              downloadList.Add(md5file.getName());
+              downloadList.Add(md5file.Name);
             }
           }
         }
@@ -151,7 +150,7 @@ namespace EZPPClient_Installer
 
             MainWindow.updateProgress(filename + " - " + value.ProgressPercentage + "% - " + Math.Round((averageTransferRate / 1024000D) * 1.8, 2) + "MBit/s", value.ProgressPercentage);
           };
-          await wc.DownloadFileTaskAsync(@"https://new.ez-pp.farm/ezppclient?file=" + filename, path + @"\" + filename);
+          await wc.DownloadFileTaskAsync(@"https://new.ez-pp.farm/ezppclient?file=" + filename + "&release=" + MainWindow.RELEASESTREAM.ToLower(), path + @"\" + filename); ;
         }
       }
       catch (WebException)

EZPPClient Installer/Utils/OsuUtil.cs

@@ -9,7 +9,7 @@ using Microsoft.Win32;
 
 namespace EZPPClient_Installer
 {
-  class Util
+  class OsuUtil
   {
     public static string osuInstallDir()
     {

EZPPClient Installer/Utils/RegistryUtil.cs

@@ -0,0 +1,41 @@
+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EZPPClient_Installer.Utils
+{
+  class RegistryUtil
+  {
+
+    public static void SetUsedReleaseStream(string release)
+    {
+      RegistryKey key = Registry.CurrentUser.CreateSubKey(@"SOFTWARE\EZPPClientInstaller");
+      key.SetValue("ReleaseStream", release);
+      key.Close();
+    }
+
+    public static String GetUsedReleaseStream(string defaultRelease)
+    {
+      string release = defaultRelease;
+      RegistryKey key = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\EZPPClientInstaller");
+
+      //if it does exist, retrieve the stored values  
+      if (key != null)
+      {
+        release = (string) key.GetValue("ReleaseStream");
+        key.Close();
+      }
+
+      return release;
+    }
+
+    public static void DeleteUsedReleaseStream()
+    {
+      Registry.CurrentUser.DeleteSubKey(@"SOFTWARE\EZPPClientInstaller");
+    }
+
+  }
+}

EZPPClient Installer/Utils/ReleaseStreamUtil.cs

@@ -0,0 +1,48 @@
+using ModernWpf.Controls;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EZPPClient_Installer
+{
+  class ReleaseStreamUtil
+  {
+
+    public static async Task<List<string>> GetAvailableReleaseStreams()
+    {
+
+      List<string> releaseStreamList = new List<string>();
+
+      try
+      {
+        using (WebClient wc = new WebClient())
+        {
+          wc.Headers.Add("user-agent", "EZPPClientInstaller");
+          var data = await wc.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?releases");
+          string[] dataList = data.Split('\n');
+          foreach (string datastring in dataList)
+          {
+            if (string.IsNullOrWhiteSpace(datastring))
+              continue;
+            releaseStreamList.Add(datastring);
+          }
+        }
+      }
+      catch (WebException error)
+      {
+        _ = new ContentDialog()
+        {
+          Title = "Oops...",
+          Content = "A error occurred while trying to fetch the ReleaseStreams.\n" + error.Message,
+          PrimaryButtonText = "Okay"
+        }.ShowAsync();
+      }
+
+      return releaseStreamList;
+    }
+
+  }
+}