In case you want to transfer your Elementor Pro license from one domain to another:
* Head over to your account , under ‘Websites’, locate the website you want to Deactivate.
* Then, click on the 3 dots menu on that website, and click “View related subscription”.
* From there, choose the website you want to disconnect and click “Disconnect Website”.
In order to reactivate your Elementor Pro license on another domain see this article.
Keep in mind there is a limit on the number of unique domains that can be used under a subscription.