Visit the Fantasy Grounds website and go to Store > Order History. All of your license keys or subscription based licensed keys will be shown there.
Open Steam on your computer and go to your Steam Library.
Right-click on Fantasy Grounds Unity and select CD Keys
Copy the Product Code to the clipboard and paste it into your Settings in the screens shown below.
All Kickstarter backers will show up on the Fantasy Grounds website. Follow the instructions shown there.
Fantasy Grounds Unity (FGU) keys are required for Fantasy Grounds Unity. Fantasy Grounds Classic (FGC) keys will not be recognized. Don’t mix and match these keys.