If you find that you can no longer activate URL Profiler, the best thing to do is email us on [email protected]
Typically this happens when you perform some sort of major update on your computer, such as upgrading to Windows 8. When this happens the OS resets the machine ID, which means it doesn't match with our records on the licensing server.
When contacting us it is always worth giving as much information as possible about any changes you have made recently which might affect this - as it will help us resolve your issue in the quickest time possible.