So I figured out how to get mine to work...

I am using Windows Vista. I right clicked on the icon that runs DVDFab (the monkey on blue ) and changed the properties and set it to prompt to be run as administrator. Then when it ran I put in the reg code and it all worked! Thing is, if I don't run as admin it appears that is is back in trial mode. Whacky Vista. I've had experience with this in the past and it usually has to do with programs writing to an area of the windows registry that Vista deems is only for admins.
What eva... its working!