I’m also having this issue where everything is backwards. I know it’s Trinus PSVR because I have uninstalled everything and tried only SteamVR and TrinusVR and had this backwards problem. When I run SteamVR without PSVR running, but with Driver4VR and PSMoveService running, the view will be forward. The motion tracking and controllers will work fine and the view will be facing the correct forward direction.
However as soon as I “start” Trinus PSVR, the view will be backwards. It’s like my head is on backwards. If I have Driver4VR running with body tracking, moving forward goes backward and moving left goes right, etc., because everything is in reverse. This can only be fixed by calibrating the headset backwards and then turning it around to face the correct way afterward.