I need help with Painter 7...It's destroying my work!

[.cfb]

Oh man, am I frustrated with Painter 7. I picked it up today, sat down for 2 hours, and made some sketches. I'd been saving, but it was as a .RIF. I hit Ctr+S for (the last) time before I was gunna quit, and Painter crashed on me. This happens sometimes when I'm working with a .PSD, but this problem has never arisen before. So, heres the problem: When I open up Painter again, and open up the file (as a .RIF), it gives me this message:

Insufficient space on disk to open new picture

I've had about 5 pictures destroyed in this manner, and was wondering if there is anything that I can do to solve it, or some way to salvage the pictures.

Please help!

[.cfb]

Ack! I'd settle for anything now...

...I've been searching pretty heavily on Google for people with this problem, but am having trouble finding the exact same situation, and I've also been searching for programs to open .RIF's, but there don't seem to be any.

Are there any programs that open .RIF's?