Both types of licenses are installed automatically when Phoenix FD is installed. These licenses might or might not be required at a particular moment, depending on the type of activity you are doing.
The following chart lays out the circumstances under which each type of license is required:
|Activity||Gui License||Simulation Licenes|
|Access the user interface of the FireSmokeSim ans LiquidSim||Required|
|Run a simulation on the local machine from the user interface of 3ds Max||Required||Required|
|Run a simulation without a user interface on the local or on a remote machine using Backburner, Deadline, or other render manager||Required|