A license key is a unique code that an individual user can use to activate the Professional version of the software on a particular browser or device belonging to that user. Each license key allows individual users to activate the software on as many as two devices or browsers simultaneously (e.g., office desktop and laptop).
Open the Expressive app and click on the ☰ menu item in the upper-left corner. From the dropdown menu, click on Upgrade to Pro, and a dialog will open. Enter your email address and the license key and click on the Activate button.
Activate your license key
The exclusive Pro features will immediately be available after you successfully activate your license key on a particular device/browser.
License info dialog