Iīm testing 6.1r with an Airwhere device (FLARM Signal output). On Menu 10, Configure Multimaps, thereīs only 4 multimaps enable/disable options. Flarm radar is on Multimap 5. So thereīs no "disable" function. Also Iīve read somewhere (probably manual for ver 6) that you canīt disable the Flarm multimap, and that it comes out only when a FLARM is detected, or also if you set a "screen button" to activate FLARM.
So my guess is that you canīt disable flarm radar. And traffic on map is only to show the flarm signals on the map screen but not to show the flarm signals on the flarm radar.