When I launch the game, the game window is white and unresponsive and will not progress any further (the loading screen doesn't load in). I have tried verifying the game cache and enabling and disabling the Steam Overlay and VR settings, as well as running it as an administrator and running it in compatibility mode. I'm running this on Windows 7.
I'm not sure if this is in any way relevant, but the YGN Connecting Test from the stickied post does not have this issue (it opens and runs fine).