I had posted several days ago regarding constant crashes with any Source engine game. It has been this way since the latest Vorpx update.
One thing I have noticed is that without fail, everytime a Source engine game crashes, my Rift’s audio is no longer the default; even if I manually disable the other audio devices through Windows 10.
vorpX per default automatically switches to Rift/Vive audio when you start a game and back to your default device afterwards. If the audio switching causes issues for you, you can disable it in the config app and instead switch devices manually as required.