Not very happy

After succesfull working with Sonar 8.5.3 I was hopefully about Sonar X1. But... I install yesterday X1b and the same things are wrong.
A earlier project mixed on 8.5 do not open on x1b. The program stopped. When I change from project to project I get a warning that X1B stopped. No i'm not happy on this moment with Sonar. I've been working with Sonar for the last 6 years and I trust it but now??? Mwaah!
Greetings from holland. Rene