The license is assigned to (or bound to) the user account, and then the user activates the product using the user account.
Each user should create a user account on the Appeon website in order to use 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 (including PowerBuilder IDE, PowerServer (PB Edition), InfoMaker, and SnapDevelop).
One user account cannot log in to the trial and paid versions at the same time.