Painter 9.5 Quitting When Saving

Hi. I am using a Mac running Tiger 10.4.9.  I own a copy of Painter 9.5. 
Recently, when I've tried saving to Riff or PSD format, the program 
quits before finishing saving. I tried erasing Painter from my hard 
drive and reinstalling it but the problem still persists. It's possible 
I missed deleting a file in my Library so I'm wondering if anyone might 
know if there could be a damaged file somewhere that is causing the 
problem.  Any advice is appreciated.  

Thanks,

Mirsky