ser6io, matsugoru,
Please be patient a couple of days more...a new mGalaxy version is to be released in the next days!
You won't have this problem anymore...and there is more:
1) the "Preference" and "Search" windows are now interactive, that means that every change made in those windows will refresh your game list in real time!
2) No need anymore for an external database file.
mGalaxy creates it directly from any new mame version.
3) You now can hide categories of games from the main list (i.e: bios, electromechanical, quiz, ...)
PS: if you, or anyone else want to test this mGalaxy v2.0 just send me an email