Your serial number is your serial number, that does not change. Unless you have the versions affected by the SM phone home activation system, there is no need to do anything. Poser 11 / Poser Pro 11 / Poser 2014 Game Dev only as it was stated above. If you have P11, I'd download the update since a. it upgrades your version to Pro if you didn't have it yet and b. it will switch your activation over to the Bondware servers.