Hi Phil,
As long as no bigger changes has happened to your environment the license should not need to re-activate itself. I'm guessing you are the Phil that I talked to this morning?
When you activate the license it binds to your system, and seeing as it now complains that it's activated on another system the only logical conclusion is that either your system has been changed or it has "forgotten" how the system looks like. Might be that some local file is missing?
If you're unable to get it working with the license you've activated in June we can re-activate them from here. Just do an offline activation and email me the license number and activation key shown in the steps.
For anyone else who whats to know how to resolve a similar question: please raise a ticket in our support line
Regards
Kai
SoapUI license Support