When the GCS starts the loading screen is OK, and then the main page displays correctly for half a second then goes to a mirror image as in the screenshot. It is a brand new install. I tried the reset, no change. It's Windows 8.
The solutions that Google gives me seem to apply to the screen as a whole, not just a single application. Obviously I don't want to apply the solution globally as fixing Librepilot would reverse everything else.
As I page through the bottom tabs I note that the welcome screen eventually rights itself and all the other tabs are correct except for the HUD and the live view of the aircraft (Flight Data tab). The HUD is always inverted and mirrored and the live view flips between the normal and inverted and mirrored states several times per second. All the configuration screens seem normal.