Further to my last comment, I think you may be running win7. Win7 is great but it does have a tendency to hide new windows created when installing some apps. So if you try again, as I did, you may find the registration button was hidden underneath other windows. Good luck and I hope this helps and ignore the low-lifes who dis someone just because they ask for some help! :-)
I had no low-lifes dissing me... The "register button" was located far removed from where it would typically be located in mainstream software... I finally found it, but it was illogically located according to my intuition, and for what that's worth, I felt need to pass it along to those fixed on improving this great software...
Miquetea - THANKS for posting that the register button was hard to find! I have Win 7, and since I didn't see the button, thought the program had already registered itself. After I saw your post, I looked again, and THERE it was. I would have missed out on this offer if I hadn't seen your post!