Hi there. First of all thanks for this piece of software, it is very nice and powerful front end. It works perfectly in practically speaking any aspect apart a small but important issue I noticed : Using Groovymame or mame (0.217 and previous versions) I cannot find the game Mazinger in any available list. I'm sure I got the right files in the right places. If I try to run Mazinger directly from mame or groovymame, the  game is correctly loaded. The strange thing is that