Hi, I just purchased LaunchBox premium (running v7.9) and I followed the basic setup tutorial on youtube (https://www.youtube.com/watch?v=SUQzvbweVgw). Unfortunately, I can't get any of my arcade game roms to launch. I've started with basic arcade games like Donkey Kong, Frogger, Burger Time, etc and have tried to use both the MAME64 and RetroArch emulators. However, when I try to launch the games, nothing happens. Any help would be greatly appreciated.