Another fix for the Demonis/Hades/etc. issue I just did.
- In Steam, go to Library
- Right-click KBWOTN and go to Properties
- Click Betas
- Choose "previousbuild - Nov12 build"
- Click Close
- Launch the game. It should be build 6246 instead of 6250. You should be back on the horse with a working camera
- Exit to the overworld. Save into a new slot. Exit the game.
- Go back to Steam, Properties, Beta
- Choose None, then Close
- Launch the game, it should show the newer build
- Load the save game and re-enter the underworld. The character should be on foot with a working camera