Vive Pro support, sticky grips, enable both hands with one activator, updated demo and fixes...

During long sessions, Vive users had a hard time pressing the grip buttons all the time, which is not comfortable and has risk of repeated strain injury (RSI). We added a "Sticky grips" feature, which you can enable in settings.

Complete list of changes:

• Vive Pro support. It must be enabled in settings.
  
• Sticky grips. Available in settings.
  
• One side enables both. Available in edit profile -> configure buttons.
  
• Fixes for Oculus Rift users during startup.
  
• Fixed presence of virtual controllers (like LIV's).
  
• Fixed long standing issue of not having both controllers connected when starting a profile.
  
• Open SteamVR automatically if it fails to connect.
  
• Added "How to move" video on Steam.
  
• Demo updated with new models, snap turning and many walking fixes.
  

Known issues:

• By default one can't use the flashlight in Fallout 4 VR. Can be remapped to trigger but one jumps when turning the flashlight on or off. Or it can be remapped to right home (use the button in the headset to open home).
  
• If you close the app without clicking "stop", some buttons remain muted until you restart SteamVR.
  
• If the demo scene is started without headset tracking, floor may be wrong in Vive, and Rift uses fall to the infinite void.
  
• In the demo, one jumps after crouching.
  

As usual, head to the community forum if you have any problem or suggestion.