You've followed the centrafuse install FAQ word by word, right? linkylinky
I have been in the exact situation as you, right after changing out a fried motherboard which caused a different hardware ID from the registration. I contacted sygic a multitude of times but never got a reply or anywhere. I did however never call them. Maybe you should give that a try.
Centrafuse handles license resets awesomely, unfortunately the product they integrated does not. Check your PM Inbox.