License Reclaiming
You can reclaim your license online by entering your license code and license ID.

Warning: Reclaim a license only when the licensed operating system is no longer in use, such as when you want to reinstall the OS or transfer the license to another device.
After reclaiming the license, the licensed OS will no longer be able to install or use iDefender. If it is detected that the licensed OS is still in use, the license will be permanently revoked.

The License ID can be found in the Pro Settings page. If you did not save it beforehand, you will not be able to reclaim your license online.