This should be an easy question to answer...

I have abacus' EZ-VFR. I went to put it on my system today, and it will only show airports in a 50-mile radius around Chicago. This is because my copy is not registered (or so it tells me), even though it was fully functional on my previous system. My question is: Because I had it registered on my previous system, am I not going to be allowed to register it on my present system? Thanks.