In the event that your licence key is invalid or in use, firstly check that you have the right key. Your licence key is different from a promo code and will have been sent to you in your welcome email from us. Alternatively, you can find this key in your account management page.
In the event of a device factory reset you may require a new licence key. In this instance please contact us at email@example.com and we would be happy to provide you with a new licence key.