In general there are two ways for changing the domain of your license:
Via plugin settings
The recommended way would look as follows:
- Deactivate your current site via plugin settings (tab “licensing”)
- Remove your license key and uninstall the plugin
- Install the plugin on your new site and activate it by entering your license key again
Via account page
In case you don't have access to your old site any more, don't worry.
Log into your account page, locate the license you wish to move and click on “Manage Sites” on the right side of the screen.
Here you can remove your old domain. Afterwards add the new domain to the license.