You may have noticed Thumper now has seven (!) launch options when you run the game from the Steam client. Here's a quick explanation.
The first three are compatible with Windows 7/8/10 and let you run the game regularly or in VR modes:
The next three only work with Windows 10. Everything is exactly the same, but the game has better support for Xbox One Controller vibration when run this way.
The final launch option is the same old legacy DX9 mode (2D only, no VR):