So the problem was you have to match the FC firmware with config firmware
1.9.1 with 1.9.1
I had 1.9.3 with V 2.0 rc3.
So I deleted the latest & took an earlier firmware only to hit one major pain in the grass. There was a NW. js file somewhere on my pc which is basically only used for flight programs but could I heck find it I uninstalled & deleted every single file that had been modified this month except for one that was nothing to do with RC. Pc was empty except for inav & drivers. Yet still not letting me open the config tool. So i tried a restore
nothing so I reset my pc & re-install the drivers flight programs WiFi Bluetooth.
Match inav wares. & now its all going.
Inav is running with motors in the motors tab & servos in its tab. So this time tomorrow it will be finished but maidened Saturday afternoon
after work. The green spray was rubbish so I got a different brand. Orange this time.
So people will have problems going back to an earlier version of inav if they delete the latest version they have saved. Best just leave it on there. Because I could not find a way to find the NW file. It doesn't delete either as it's stored or cached somewhere else.
The only file I had left was modified yesterday but when you look in it there was 3 from 2015. & not letting me get rid so a reset it was. I'm still learning.