- added experimental support for Loewe / Hisense 2017 servicelist.db

file format
- show error message when trying to open a .zip file that doen't contain
  the expected files of a Samsung J series or Toshiba .zip channel list
- show error message when trying to open a broken .zip file, which is
  most likely caused by exporting to a USB stick formatted with NTFS
- allow changing the "crypt" flag for Samsung .scm lists
- iterating through loaders supporting a file extension till one can read the file

source/ChanSort.Loader.SamsungJ/ChanSort.Loader.SamsungJ.csproj

@@ -9,8 +9,9 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ChanSort.Loader.SamsungJ</RootNamespace>
     <AssemblyName>ChanSort.Loader.SamsungJ</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

source/ChanSort.Loader.SamsungJ/DbSerializer.cs

@@ -55,7 +55,11 @@ namespace ChanSort.Loader.SamsungJ
         catch { }
       }
 
-      foreach (var filePath in Directory.GetFiles(tempDir, "*."))
+      var files = Directory.GetFiles(tempDir, "*.");
+      if (files.Length == 0)
+        throw new FileLoadException("The Samsung .zip channel list archive does not contain any supported files.");
+
+      foreach (var filePath in files)
       {
         var filename = Path.GetFileName(filePath) ?? "";
         if (filename.StartsWith("vconf_"))

source/ChanSort.Loader.SamsungJ/DbSerializerPlugin.cs

@@ -4,7 +4,7 @@ namespace ChanSort.Loader.SamsungJ
 {
   public class DbSerializerPlugin : ISerializerPlugin
   {
-    public string PluginName => "Samsung J-Series (*.zip)";
+    public string PluginName => "Samsung J-K series";
     public string FileFilter => "*.zip"; // "channel_list_t*.zip";
 
     public SerializerBase CreateSerializer(string inputFile)