Currently there is no way to extend an existing subscription.
- Please buy a new code and keep if safe. Don't worry your new code will not start counting days until you enter in the app for the first time.
- Waiting until your current subscription expires. The app will request a new code.
- At this point, enter the new code.
Please purchase the new code ahead of time to ensure uninterrupted service and account for any unintended delivery delays.