Or how about an option to "put all of your favorites in a special folder". This way, you can't accidentially remove any roms. Step 1: You go through your MAME games, trying them out. If you like the game, you choose "Add to favorites". Step 2: When you're done, you go to the main menu where (hopefully some time in the future) you can click "Copy all Favorites to [favorites folder]". Now you get a folder with ONLY the roms that you want to keep, and (hopefully) GameEx will automatically check if the rom sets are complete, in case you "move" a cloned set. Step 3: Now you can delete the contents of you "roms" folder and put your favorites into it. Emph