Login to your admin account and click "Admin" in the top navigation to get to your Admin Dashboard. Click on the Users option in the menu.
Click on the edit button next to the user whose license you would like to free up.
If the license can be removed from this user, you will see a "Remove License" button - click this to release that license for someone else.
If a user has already gone through several lessons, the license will not be able to be removed.
You can email email@example.com if you have more questions about this policy.