No, you don't need to do that. Since you're using the free version, at worst you "should" be able to select the "clear & start over" option under My Account. I'm not that familiar with the online version myself. But it's my understanding that if you've already registered (whatever that is for the free version, I don't know) then there is a way to do this in the TOOLS section under My Account. So check in there first.
