Komplete Kontrol A25 - change key

Hi all!

I have seen posts etc on changing the key of Komplete Kontrol. So far I can't still managed to change the key/tuning to -half tone (c must be B, B must be Bes etc). My guitar is tuned half tone down and it is must easier if the keys are also tuned half tone down.

The manual tells sort of how to do it, but for some reason I didn't manage.

Who can help?

Many thanks!

Steven