You can transfer your license by revoking previously registered domains, before attempting to license it onto another domain.
To revoke the previous domain from the license, you can do so from our license management panel, which can be found at http://license.marketinsg.com.
Login at http://license.marketinsg.com.
View the license you wish to manage by clicking the 'View' button.
A list of domains registered to the license will be shown. Click on the red X button to revoke the registered domain from the license.
Go to the domain you wish to license it on and enter in the license key.