Hi Nicolas,
Thank you for the detailed explanation of your problem. It really sounds like you have run into some sort of database problem. Are you using MySQL? If so, you should go to Datbase -> Repair Database. If not, please send your log file, which you can find at c:/program files/pokeroffice/log/systemlog.txt, to
support@pokeroffice.com
It's correct that PokerOffice doesn't support Stud, but playing Stud with PokerOffice running should not cause the kind of problems you're describing.
Thanks!