What does the launcher window say in the upper right corner? It should just say v3.2.3, not v3.2.3 FREE.
If it says FREE, then make sure that you put your license key you received from FG store (via e-mail, or also available in Order History on the Store) or from Steam (click on Fantasy Grounds in Steam Library, and select CD Key on the right).
If you are still having problems getting the version to update off of FREE, send a note to
[email protected]
Regards,
JPG