I'm new to RetroArch and Launchbox. I solely downloaded these two to play Castlevania: Rondo of Blood. The only core it works with is NEC - TurboGrafx- CD Beetle PCE Fast. When I tap the game to play in Launchbox to open with RetroArch using the mednafenpcelibretro...- it loads and says to press the run button. I press Start and it gets stuck at the Just A Moment screen for longer than 10min. Please I need help playing this game