fix fetch language from the registry
better way to check is Visual Studio installed or not (the IDE executable devenv.exe exists or not)
Only 9 numbers are available in choice.exe, but sometimes (after many updates) count of different database versions may be >9.
So, now the list is sorted by descending and old versions are displayed, but they are not available to select http://i.imgur.com/bMEQTvB.png
If one of the old versions is needed, user can remove directories with unused database versions.