WN3500RP - how to allow device to device communication?

I am using a WN3500RP range extender and trying to connect a Skytrak golf launch monitor and my iPad. The Skytrak launch monitor requires device to device communication to be enabled to function so it can link to the app on my iPad. Documentation suggests that "guest mode" must be turned off so device to device communication is possible.

is this possible on the WN3500RP? The devices work on my router network but don't seem to link on the WN3500RP extender... So I'm guessing "guest mode" is on by default? Can it be turned off, and if so, how? I can't find any reference to such a setting in the WN3500RP documentation.