Traktor Pro 4 has no Audio Output when connected to Traktor S4 MK1

japanese_knotweed

I recently upgraded to Traktor Pro 4 after taking some advice that my audio glitches were related to Traktor Pro 2.

I did this and it connected to my S4 MK1 great, DJed on it nearly all day over the weekend.

However, today I absolutely can't get a relevant audio output, the built in "Traktor Kontrol S4 (ASIO)" audio output option never worked, it worked on "Traktor Kontrol S4 (WASAPI (Shared Mode))"

However this no longer is in my list of options and I'm absolutely at a loss at how to get it back - there's lots of other options for WASAPI Shared Mode but the dedicated Traktor Kontrol S4 one has gone.

Nothing else works.