V2.2: Can't open older Projects

Hi,
obviously I'm the only one, having a problem with opening SNS-Projects created by a former version (2.0.1).
When I want to open an older project I receive the message "Undefined Error".
Isn't there a possibility to covert the older files so that I can still use them?
Greetings,
UMS
obviously I'm the only one, having a problem with opening SNS-Projects created by a former version (2.0.1).
When I want to open an older project I receive the message "Undefined Error".
Isn't there a possibility to covert the older files so that I can still use them?
Greetings,
UMS