I just finished the 1st 3 my pet dungeons and had saved them. Then it crashed and I lost all my progress. The pet dungeons are relocked and loading my save does no good it just boots me back to the 1st one. Anyone know how to fix this? I am running XP.

I don't know if this will help, I'm still 'testing' it, but when I play I make it so my computer only uses 1 core processor instead of 4-5 processor cores, haven't had it crash yet.
Can't help with the saves, though I did have to re-install it today, without un-installing it, and it saved my progress (hurray).
my problem was that the game just randomly decided not to load.

I have had the similar issue on the first crash I experienced with all campaign progress lost.

The best solution is to save at the beginning of each level.