Even though Pimax4K is not listed as HMD in FlyInside FSX Pro 1.92 - for Flight Simulator X, I heard that Pimax 4K is indeed working!
My question is: which App should I use
Oculus Runtime 1.10
or
Vive and Mixed Reality (SteamVR) ?
...And I own FSX Gold edition, not the Steam version, so I hope if it is VIVE, I don't have to buy the Steam version.