With the older games not showing up, I think something more than the xml not being up to date is going on.
There are probably a half dozen relevant details we're not getting.
Can you post a screen grab of your rom settings in Mala?
Thanks, stuff like joust, space invaders, ms paceman...classics. The Roms were all there from day one. How do I force regenerate the xml file? Assuming that's what needs to happen.
delete mame.xml from the mame folder
Next time Mala is launched, it will ask you to regenerate it.
Refresh the all games list.
It might not ask to regenerate it until you refresh the list. I don't remember exactly.
Mala may appear frozen because it takes so long to generate the xml, but just give it time.