Good shout. Will probably do that this weekend as part of the troubleshooting. Just opened Zendesk ticket for this issue. MSFS hangs around 90% loading if SteamVR is running prior to MSFS. If SteamVR is not running, MSFS loads fine but then after starting SteamVR, switching to VR in MSFS via the menu option or CTRL+Tab hangs MSFS and VR will not start. I need to quit SteamVR then MSFS will give the initialization failed error and become responsive again. Still thinking something is borked between MSFS and SteamVR.