How to Change the Domain Associated with a Key
It's possible to change the website associated with an activation key by going to your MailPoet 3 account.
Once inside your account, click on the Manage button to edit your license or subscription on My Subscriptions page:
Remove the existing domain address from the activation key by clicking on the "X":
And confirm you want to remove this domain from the license:
Important! Don't click on the "Cancel" button, otherwise, your subscription will be set to be canceled by the end of the current billing period.
Then the key will be available to be activated again on a new website or for a new domain address:
Go to your MailPoet's Settings page > Key Activation tab and add it to the field: