I have ultimate license how do I invite friends?

[Tingler]

How do I invite friends without it costing them money? I purchased the grand puba in hopes of preventing that. Do they still need to purchase something?

[Trenloe]

They just need to run the installer found in the downloads page: https://www.fantasygrounds.com/downloads/ This will install the unregistered version which is all they need to connect to your ultimate licence.

Then send them the alias for your campaign (found in the right of the "load campaign" screen on the GM side). The GM must be fully running their game for the players to connect.