Disable VR (HTC Vive) for specific scene?

I have a game that is played with VR but I also have a map editor in the game. I want the map editor to be played like a normal non-VR game using your mouse and keyboard. Does anyone knows how I can disable the HTC Vive/SteamVR with code?

I have tried the following but it doesn't do anything.
I also tried this but it crashes Unity:
The reason I want to disable it...

Disable VR (HTC Vive) for specific scene?