Remove airlines from real-time traffic

Is there a way to remove airlines from the built-in real time traffic? Now that Spirit is gone, I want to make sure it doesn’t show up. I also still hear critter (the old call sign for ValuJet) when I’m flying in the Miami area.

I use FS Traffic, but if I set the real-time traffic to off, I don’t see any traffic flying around. Granted I’m flying in a corridor that’s probably not busy (KCDW-KACK), but I would expect to see other airlines flying about.

Thanks.