I have decided to give up on the navi for now, and bought a magicsee r1 to try instead. And it works very well. Not as sensitive as the navi but tracks better, and saves mapping every time. So I won’t need to get the navi working any time soon now. It is fine as a spare WASD controller.
I have attached the settings file anyway in case it helps you solve this problem (if it isn’t just me) and get navis working in general. I think the navi controller is all the ones with the 000000000… ids.