Just noticed that the Randolph-Turning Pont1 over Grand Canyon (RN01) airport is set at 15,500ft elevation causing an impressive monolith to form.

Renaming trafficAircraft.bgl in Scenery\World\Scenery to trafficAircraft.off will disable all the default traffic and you can turn your slider back up to 100%. That fixed it for me, I was in the same boat as Shylock_7 . Having UTL but not wanting default and no military stuff appearing. Thanks! :D