I've responded to several people with the same problem you are having. The fault does not lie, as far as we know, with the TBM. So a refund can't be given. The exception handler problem occurs when you have some kind of AI traffic running. This is something that needs to be addressed with the World traffic developers because all the TBM is doing is reading traffic. When the error comes up as it does (something reinstalled our exception handler), that is very likely the traffic program doing something to the TBM and causing a crash. Not all crashes are caused by the TBM.
For a workaround, please see this post.