Recently upgraded to 5.4 for my new Intel MacBook. Since then nothing happens when I try to select a soundtrack from the menu, nor when I select a source file for a switch layer. Works fine in 5.3 on my G5.
Can a no-talent hack make cartoons with just clip art and a Mac? You bet!
Can you select and play back the WAV files included with Moho? (Look in the .../Moho/Tutorials/5 - Animation/ folder.) I can open those WAV files in both the Intel and PPC versions with no problem. If you can open those, but not others, please post links to the problem files so I can take a look.