problems with Eudora and OS 9

A member of our user group has recently been having problems with 
Eudora 5.1.1 running on a G3 iMac under OS 9.1. I'm not sure of the 
exact history of her problems, but I think she did an update and then 
things went bad. The program cannot keep her settings, and keeps 
rewriting the Eudora folder with new files with no settings.

I've tried to help her, but have never used this and can't figure out 
what to fix. Please respond to my email without the nospam.

Thanks,
-- 
John Gentile
Newsletter editor
Rhode Island Apple Group