I tried deleted the settings.json file and after restarting it seems to be all fine. It even restored the camera settings that I'd configured previously.
The settings.json that I deleted was 5K in size but there was nothing readable in there. Tried viewing it in several apps on both a PC and a Mac and it appeared to be empty.
All good now.
Thanks for the update. Obviously the settings file had got corrupted somehow - should be a json text file.
Sounds like BVD found the older settings file and migrated that in the new ones absence (as it should)
But you can create a a backup and then restore settings from the about tab in case this happens down the track.
Would suggest this is a good idea once have all cameras set up
With a big Windows update there is a small risk that settings file will move/disappear.. happened once, but hopefully not again.. who knows with Microsoft though...