• Native Index controller support
  
• Support for controller mapping with the SteamVR Input system
  
• New option to disable the purple shield from automatically appearing when controllers are close. So now you can configure the purple shield to appear solely from a mapping of your choice.
  
• Nicer looking obstacles to duck under in Fitness modes
  
• A few other small graphics improvements
  

Have fun!

EDIT: Thanks for the reports!
Sparks now fly from hard punches as they should.
Mixed reality is fixed now too.