The depth add-on now speaks Vulkan, not only Direct3D - so a flat game that renders through Vulkan can finally get depth instead of being turned away at the door. It ships with the app as version 2.3 - run the add-on setup again for each game you use it with, because updating FlatVR does not touch the copy already sitting in a game folder.
Picking the game is a list now, ranked by which graphics API each .exe actually imports - no more guessing which one is the game and which is the launcher.
Fixed: the OpenTrack output had its axes crossed, so Invert Yaw was faithfully inverting your roll. Crash reports now name any injected overlay in the process, and the build they came from.
Rolling back: right-click FlatVR in your library -> Properties -> Betas -> last_stable. Settings are kept either way.