The original version did not for me either. I uninstalled it and the second and third versions both have worked fine.

I suggest sending Flandry a note, or post about it so others can be aware as well. Shame for such a great thing to not be enjoyed by others. There are TONS of classics that play great on the current version. We just need to give Flandy space and time to update when he can.

A portable version of an up to date MAME set (135) is a huge and unique deal. If you are an old school gamer, of course.