Still can crash it on scene changes

[Piplodocus]

Still sometimes won't change scenes when it's supposed to, and then sometimes locks up when I have scenes in different time signatures and I reorder or duplicate some.

Different song to before but this one features scenes of 6/4, 13/4, 14/4, 8/4, and 7/4. Started acting up after only the first 3 of them. Now it's stuck and won't do anything while a load of play symbols flash away on the line that wouldn't play before I stopped it.

When you try to quit it won't for ages then has a crash.

Doesn't seem to do it when reordering scenes while not playing, but whilst I'm writing I forget to press stop, poke about with the scenes, duplicate, reorder, then FREEEZE! Crash/quit time again.