Kontact excess Mixer channels?

Anyone use Kontact?

I’ve got 40 “unassigned” channels/tracks in Dorico’s mixer, (from 2 instances of Kontact), in addition to the outputs I’ve configured in the Player, and the 4 aux channels that I can’t get rid of!

Anyone know how to tidy these up?
Screenshot 3.png

Endpoint Setup dialog > number of audio outputs = 1

I already had that set to 8 (the number of Players and channels I was using), but changing it to 1 and resetting it back to 8 has removed all the excess tracks.