You'll need to check the logs. They are located in the local users 'Documents' folder. It might tell you what the issue is. Could be as simple as pre-reqs for .NET or something is messing it up and causing it to crash. Check the version of the MBG as well. The connector will only support a certain one (I think 7 and up IIRC).
That and 6.0.2.2 is GA tomorrow (5/24/2013), so you can go that in hopes of clearing the issue.
Otherwise, email support@prairiefyre.com. They will want the logs on the client though.
Is it crashing when your using a specific application? As soon as you connect? After 10 minutes?