In anticipation of the Episode 4 release a beta patch was uploaded to the "releasecandidate" branch. The list of changes is big, so we could use some last minute testing!
Full change log is found in this thread for the time being: http://steamcommunity.com/app/313630/discussions/0/364041432730225313/
Among the more noteworthy changes are permanent modifiers. You can now pick one special upgrade at the start of each game.
Other key changes:
*Performance and loading times improved.
*Oculus and Vive SDK upgraded, and support for stereo rendering.
*Female voice support is in.
*More achievements
Edit: For the Vive crash a fix is coming up, but in the mean time you can modify installdirectory\Solus\Config\DefaultGame.ini and set LoadingScreens=False. That fixes the crashes.