Thanks for writing in! You can always manage the license right in your account. You will need to revoke and revalidate your site. You can assign a production site and a staging site for each of your licenses.
To validate X properly, please do the following:
1] Please login to your account and assign the license. You need to assign the license to your site using this url: https://www.example.com/. You have to make sure that url you just assign is the same as the one you have in your settings, Settings > General > Site Address
If you already assigned your license, simply hover on the license and click the edit icon. Insert your new url and hit save icon.
2] Go back to X > Overview, and insert the license again.
And please review the changes that we made on how you are going to validated your X theme because we made a big change in the process. Please check it out here: https://theme.co/apex/forum/t/setup-product-validation/55