Ok guys I had the same problem that poker.exe was suddenly crashing every time I tried to open a table and after some hours I found the problem and fixed it and then forwarded the solucion to IPN/Boss through ParadisePoker and got a 50€ thanks gift to my account (was actually hoping for more

). Here is their answer to ParadisePoker:
Dear Support,
Thank you for the email regarding SB PIN: 5753294.
Please be informed that our technicians have confirmed that the fix provided by this player, worked for other player's as well. Kindly thank the player for providing us with his valuable findings / observation.
We have also credited this player's account with €50 as a token of appreciation.
If we can be of any further assistance, please do not hesitate to contact us.
So here is how the problem is fixed: Start by going to folder settings and make hidden folders visible. C:\Users\username\AppData\Local\Boss Media\Opoker and you will find the file playercolors.txt. If you dont care about losing all the colornotes of players you have, you can delete this file and your tables will work again. But I wanted to keep my colors so I opened the file and found that it was some players nicknames that cause the crash. If a nickname ends with a = mark it will cause the tables to crash. A normal nickname like John with a color lookes like this: John=43752. I had a player whos nick was === that I had tried to put a color on. So I deleted that row that looked like: ====43752. Finally if your first row looks like: =0 delete the first row as well. After this your tables wont crash any longer and all your colors will remain.