1. Open Nero Start
  2. Click on the Nero Account Icon. You'll find it in the top right corner.
  3. If you are using version 24.5 of Nero Start, click on "Add product".
    If you are using an older version, click on "Manage my account".
  4. In the bottom of "My products", click "Activate more products".
  5. Enter your activation code.