Seriously, this is kinda stupid to manually search for a game in that infinite list of games and then additionally browse for a launch file! Why not to simple add an option to drag and drop the launch file in the library list??!
If game is supported then it is added and if it's not - give popup with "This launch file is currently not supported. If you believe it is a mistake, visit "http://support.raptr.com/support/discussions/forums/5000146589" to leave a request ticket.