Thankyou
I did back up my iTunes collection to an external hard drive, which I have installed this back on my laptop after uninstalling Mixed in key.
I did this presuming the backed up collection would not have any tags which MIK would have written to the files.
This may be a coincidence with the mixed in key because even on new downloads, Traktor analysis has still got every track wrong. Also it’s the same margin of error on every one.
I have also just upgraded to the S4 controller so I’m wondering if this could have caused an issue?