Per the information from Image Line:
- Kontrol S MK3 compatible with FL Studio 21.2.3 and up.
- In FL Studio MIDI Settings users may need to click the Update MIDI Scripts button then Refresh Device List button.
- If a user has already changed some settings for the Keyboard previously, it won't automatically set the scripts.
- That would have to be done manually at that stage, unless a user first deletes their registry settings for FL Studio (for brand new users going forward it should be more seamless).