Well, I still don't have the registration changed--I think the original owner is tied up with work. I still don't "get" the whole thing about unlocking parts of the software. But given that I couldn't get my original asking price, and I'm still trying to figure out my way around it, I think I'll keep it as a backup, at least for the time being. Thanks the help of people from on-line, I at least have managed to go through the menu and *think* I see the basic function.
Thanks for the help from folks. I'll post back if I decide to give selling it a go again.