as far as i know, there is no other option at the moment, all you can do is restart the client. Here's a tip to make it faster (since you have to close each and every table your on before you can close the client)
1. ctrl+atl+del (bring up your computers "task manager")
2. select your poker client.
3. press "end task"
this should force close your poker client. depending on your computer speed, you should be able to complete this whole process in about 10-20 seconds. Reopening your old games however is another issue
wpn has stated they are working on a software fix that reopens your games after restarting the client. I hope this helps you.