Until recently, an eDGe was locked to the registered owner until the owner releases it for transfer via the enTourage website's My Account.

This is no longer necessary.

If you get an eDGe from someone else, simply run the Registration wizard to assign it to yourself (Settings - eDGe Settings - Register).

If you're giving your eDGe to someone, I recommend you do a "golden update" (search "Ermine" on the enTourage support website) on it to do a full factory erase & reset, which also wipes out your registration info.