Hello, I couldn't find any information about the manifest file, how to use the manifest file, the engine gives us its unencrypted version.

Launcher.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.27428.2011
+VisualStudioVersion = 15.0.27130.2010
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Launcher", "Launcher\Launcher.csproj", "{1BDB18BA-1B02-40C2-BF21-9A239A4CA751}"
 EndProject

Launcher/App.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.1"/>
     </startup>
 </configuration>

Launcher/Launcher.csproj

@@ -9,10 +9,25 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>Launcher</RootNamespace>
     <AssemblyName>Launcher</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -32,11 +47,19 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup>
     <StartupObject>Launcher.Program</StartupObject>
   </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationIcon>icon.ico</ApplicationIcon>
+  </PropertyGroup>
   <ItemGroup>
+    <Reference Include="FileDownloader, Version=1.0.6876.3612, Culture=neutral, processorArchitecture=x86">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\FileDownloader.dll</HintPath>
+    </Reference>
     <Reference Include="MetroFramework, Version=1.4.0.0, Culture=neutral, PublicKeyToken=5f91a84759bf584a, processorArchitecture=MSIL">
       <HintPath>..\packages\MetroModernUI.1.4.0.0\lib\net\MetroFramework.dll</HintPath>
       <Private>True</Private>
@@ -51,6 +74,9 @@
     </Reference>
     <Reference Include="Microsoft.VisualBasic" />
     <Reference Include="Microsoft.VisualBasic.Compatibility" />
+    <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
     <Reference Include="stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
       <EmbedInteropTypes>True</EmbedInteropTypes>
     </Reference>
@@ -76,7 +102,9 @@
       <DependentUpon>LauncherSettings.cs</DependentUpon>
     </Compile>
     <Compile Include="MainView\AutoUpdater.cs" />
+    <Compile Include="MainView\Cache.cs" />
     <Compile Include="MainView\Downloader.cs" />
+    <Compile Include="MainView\IniFile.cs" />
     <Compile Include="MainView\main.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -120,7 +148,9 @@
     </Compile>
   </ItemGroup>
   <ItemGroup>
-    <None Include="App.config" />
+    <None Include="App.config">
+      <SubType>Designer</SubType>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\button.png" />
@@ -134,6 +164,23 @@
   <ItemGroup>
     <None Include="Resources\settingsFont.png" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="icon.ico" />
+    <Content Include="Resources\bg.jpeg" />
+    <Content Include="Resources\icon.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <BootstrapperPackage Include=".NETFramework,Version=v4.6.1">
+      <Visible>False</Visible>
+      <ProductName>Microsoft .NET Framework 4.6.1 %28x86 und x64%29</ProductName>
+      <Install>true</Install>
+    </BootstrapperPackage>
+    <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1">
+      <Visible>False</Visible>
+      <ProductName>.NET Framework 3.5 SP1</ProductName>
+      <Install>false</Install>
+    </BootstrapperPackage>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

Launcher/Launcher.csproj.user

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <PublishUrlHistory />
+    <InstallUrlHistory />
+    <SupportUrlHistory />
+    <UpdateUrlHistory />
+    <BootstrapperUrlHistory />
+    <ErrorReportUrlHistory />
+    <FallbackCulture>de-DE</FallbackCulture>
+    <VerifyUploadedFiles>false</VerifyUploadedFiles>
+  </PropertyGroup>
+</Project>

Launcher/MainView/Cache.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Net;
+using System.IO;
+using FileDownloader;
+using Newtonsoft.Json;
+
+namespace FileDownloader
+{
+    class CachObject
+    {
+        public string URI { get; set; }
+        public string PATH { get; set; }
+        public string[] HEADERS { get; set; }
+    }
+
+    class Base64
+    {
+        public static string Base64Encode(string plainText)
+        {
+            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
+            return System.Convert.ToBase64String(plainTextBytes);
+        }
+
+        public static string Base64Decode(string base64EncodedData)
+        {
+            var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
+            return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
+        }
+    }
+
+    class Cache : IDownloadCache
+    {
+        string filepath
+        {
+            get {
+                if(Directory.Exists(System.IO.Path.GetFullPath("./") + @"\cache"))
+                    return System.IO.Path.GetFullPath("./") + @"\cache\";
+                else
+                {
+                    Directory.CreateDirectory(System.IO.Path.GetFullPath("./") + @"\cache");
+                    return System.IO.Path.GetFullPath("./") + @"\cache\";
+                }
+            }
+        }
+        void IDownloadCache.Add(Uri uri, string path, WebHeaderCollection headers)
+        {
+            CachObject cach = new CachObject() { URI = uri.AbsoluteUri, PATH = path, HEADERS = headers.AllKeys };
+            string jsonData = JsonConvert.SerializeObject(cach);
+            string Path = Base64.Base64Encode(uri.AbsolutePath).Replace("\\", "");
+            File.WriteAllText(filepath + Path, jsonData);
+        }
+
+        string IDownloadCache.Get(Uri uri, WebHeaderCollection headers)
+        {
+            string Path = Base64.Base64Encode(uri.AbsolutePath).Replace("\\", "");
+            string PATH = filepath + Path;
+            if (File.Exists(PATH))
+            {
+                var JsonEncoded = File.ReadAllText(PATH);
+                CachObject account = JsonConvert.DeserializeObject<CachObject>(JsonEncoded);
+                return account.PATH;
+            }
+            else
+                return null;
+        }
+
+        void IDownloadCache.Invalidate(Uri uri)
+        {
+            string Path = Base64.Base64Encode(uri.AbsolutePath).Replace("\\", "");
+            string PATH = filepath + Path;
+            if (File.Exists(PATH))
+                File.Delete(PATH);
+        }
+    }
+}

Launcher/MainView/Downloader.cs

@@ -4,14 +4,16 @@
 using System.Net;
 using System.IO;
 using System.Windows.Forms;
+using FileDownloader;
 
 namespace Launcher
 {
     public class Downloader
     {
         private main MainView;
         private BackgroundWorker Worker;
-        private WebClient _wc = new WebClient();
+        public static IDownloadCache downloadCache = new Cache();
+        public IFileDownloader _wc = new FileDownloader.FileDownloader(downloadCache);
         private List<string> downloadList;
         public bool downloadInProgress = false;
         private long downloadedAmount = 0;
@@ -52,9 +54,13 @@ stop the worker
         /********************************/
         public void CancelWorker()
         {
-            _wc.Dispose();
-            Worker.CancelAsync();
-            inter.StopNetworkInterface();
+            if (Worker != null)
+            {
+                Worker.Dispose();
+                Worker.CancelAsync();
+            }
+            if(inter != null)
+                inter.StopNetworkInterface();
         }
         /*******************************
             simple function to check if a file exist
@@ -77,7 +83,7 @@ private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
                 if (Worker.CancellationPending)
                 {
                     MainView = null;
-                    _wc.CancelAsync();
+                    _wc.CancelDownloadAsync();
                     e.Cancel = true;
                 }
                 else
@@ -139,10 +145,10 @@ public void startDownload(string fileToDownloadLink, string PathToSaveFile)
         {
             try
             {
-                using (_wc = new WebClient())
+                using (_wc = new FileDownloader.FileDownloader(downloadCache))
                 {
-                    _wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
-                    _wc.DownloadFileCompleted += new AsyncCompletedEventHandler(client_DownloadFileCompleted);
+                    _wc.DownloadProgressChanged += new EventHandler<DownloadFileProgressChangedArgs>(client_DownloadProgressChanged);
+                    _wc.DownloadFileCompleted += new EventHandler<DownloadFileCompletedArgs>(client_DownloadFileCompleted);
                     _wc.DownloadFileAsync(new Uri(fileToDownloadLink), PathToSaveFile);
                 }
             }
@@ -157,7 +163,7 @@ public void startDownload(string fileToDownloadLink, string PathToSaveFile)
         /*******************************
             update the progress of the download
         /********************************/
-        void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
+        void client_DownloadProgressChanged(object sender, DownloadFileProgressChangedArgs e)
         {
             if (MainView != null && MainView.Created)
             {
@@ -169,25 +175,32 @@ void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventA
         /*******************************
             file downloaded
         /********************************/
-        void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
+        void client_DownloadFileCompleted(object sender, DownloadFileCompletedArgs e)
         {
-            if (e.Cancelled)
+            if (e.State == CompletedState.Canceled)
             {
-                _wc.CancelAsync();
+                _wc.CancelDownloadAsync();
             }
             else if (e.Error != null)
             {
-                _wc.CancelAsync();
+                _wc.CancelDownloadAsync();
             }
 
             downloadInProgress = false;
 
             totalDownloaded += downloadedAmount;
-            MainView.Invoke(new Action(() => MainView.updateAlreadyDownloaded(downloadedAmount)));            
-            if ( ( (totalDownloaded / totalSize) * 100) == 100 || currentFile == downloadList.Count)
+            try
             {
-                MainView.Invoke(new Action(() => MainView.UpdateCompleted()));
-                inter.StopNetworkInterface();
+                MainView.Invoke(new Action(() => MainView.updateAlreadyDownloaded(downloadedAmount)));
+                if (((totalDownloaded / totalSize) * 100) == 100 || currentFile == downloadList.Count)
+                {
+                    MainView.Invoke(new Action(() => MainView.UpdateCompleted()));
+                    inter.StopNetworkInterface();
+                }
+            }
+            catch
+            {
+
             }
         }
     }

Launcher/MainView/IniFile.cs

@@ -0,0 +1,52 @@
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Text;
+
+// Change this to match your program's normal namespace
+namespace Launcher.MainView
+{
+    class IniFile   // revision 11
+    {
+        string Path;
+        string EXE = Assembly.GetExecutingAssembly().GetName().Name;
+
+        [DllImport("kernel32", CharSet = CharSet.Unicode)]
+        static extern long WritePrivateProfileString(string Section, string Key, string Value, string FilePath);
+
+        [DllImport("kernel32", CharSet = CharSet.Unicode)]
+        static extern int GetPrivateProfileString(string Section, string Key, string Default, StringBuilder RetVal, int Size, string FilePath);
+
+        public IniFile(string IniPath = null)
+        {
+            Path = new FileInfo(IniPath ?? EXE + ".ini").FullName.ToString();
+        }
+
+        public string Read(string Key, string Section = null)
+        {
+            var RetVal = new StringBuilder(255);
+            GetPrivateProfileString(Section ?? EXE, Key, "", RetVal, 255, Path);
+            return RetVal.ToString();
+        }
+
+        public void Write(string Key, string Value, string Section = null)
+        {
+            WritePrivateProfileString(Section ?? EXE, Key, Value, Path);
+        }
+
+        public void DeleteKey(string Key, string Section = null)
+        {
+            Write(Key, null, Section ?? EXE);
+        }
+
+        public void DeleteSection(string Section = null)
+        {
+            Write(null, null, Section ?? EXE);
+        }
+
+        public bool KeyExists(string Key, string Section = null)
+        {
+            return Read(Key, Section).Length > 0;
+        }
+    }
+}

Launcher/MainView/Repair.cs

@@ -78,6 +78,10 @@ public void PerformRepair(main MainfForm)
                         fileToDownload.Add(FilePath);
                         TotalSize += long.Parse(converted[2]); // size of the file
                     }
+                    //else if ()
+                    //{
+
+                    //}
                 }
                 counter+=1;
                 if (MainfForm != null && MainfForm.Created)