The Lighting Controller

The menu option "Fixtures Setting" is grayed.

Usually, the problem comes from a resident antivirus/firewall protection software which blocks internal ip communication.
And most of the time, the Windows firewall blocks it. You have to select "Unblock" in "Windows Security Alert" window.



If you selected "Keep blocking", you have to manually open the port #7347.

Please check also that in the main menu "Preferences", tab "Network", the IP for the software is "127.0.0.1".

"127.0.0.1" means "local" ; this always works (whatever is the real IP address of the computer) when the main program and the 3D program are running on the same computer.