With the Nero 9 trial version: You do not need to download Nero 9 again to activate the full version. Open the Nero ControlCenter in Nero StartSmart by clicking on the "NeroStart" button in the lower left-hand corner and then click on Toolbox > ControlCenter. On the left-hand side, click on "License" and "Add", in order to enter your Nero serial number. After you have entered your serial number, click again on "Add" to enter the new serial number. If your full version serial number does not appear, simply highlight your demo version serial number and click "Delete". Close the ControlCenter and confirm the following messages by clicking "OK". Restart Nero StartSmart to activate the changes.
