The license is assigned to (or bound to) the user account, and then the user activates the product by logging to the product with the user account.
Each user should create a user account on the Appeon website in order to log into the Appeon product. The email address and the password they entered for registration will be used as the user account for not only logging into the Appeon website but also activating the Appeon product.
One user account cannot log in to the trial and paid versions at the same time.