This snippet isn\'t too great, I\'m sorry. You seem to assume other users have these demos/games installed (some are) to the snippet user\'s computer, or you just got this code from your personal remotes. As the others have already said, it would be much more compatible to use a code as this:

menu channel {
  Run application:{
   var %t $$sfile(C:\\,Choose an file/application to run:)
   run %t
  }
}