This has been posted before, but I'm sure it's buried somewhere deep.
Folks are still posting about problems regenerating activation keys after getting a new pc or reformatting.
Here's what you do and you'll never have that problem again.
1) Backup your Pixie folder to disk or another hard drive.
You can find that folder here............
C:\Documents and Settings\All Users\Application Data\Pinnacle\Pixie
2) Just before installing Studio on a new hard drive or a new computer, put this folder back where you got it and when you install Studio, all your previously unlocked stuff will be unlocked and ready to go.
(If you cannot find the Pixie Folder go to Conrol Panel | Folder Options | View and check the box, "Show hidden files & folders".) (Thanks Paul)
There are two of us that just did this with new computers so I know it still works.