OK, I think I've sorted out most of the interface bugs. Here's Beta 9D:
http://www.fish-byte.com/MA3Beta.zip
The proper filenames should remain highlighted now.
When you press C to bring up a clock, it will remain on the screen for 10 seconds, instead of just for the remainder of the previous logo's time.
The up-down arrows now go the right direction, and the top limit is 240 instead of 100.