Re-instantiating fixed it, thanks ED
For others, I attached a cfg file that could be used as a default rather than 1 Stereo 4 Aux.
On PC, extract to:
C:\Users\username\AppData\Local\Native Instruments\Kontakt 5\default\Output Section Presets
Once there it should show up as a preset that you can set to default...
I disabled the Aux channels but if you need them you'll need to set an output.