Sorry to hear that the manufacturer wasn't able to fix the faulty goggles.
Well, unfortunately I think adding a left/right eye switching feature to Freerider would not be a good idea since it's such a unusual problem that as far as I know is only affecting these specific model of goggles that has not been fixed by the manufacturer. (Feature creep and these type of very specific special "fixes" is generally something to avoid in software development).
If you are mostly using the goggles for FPV flying (as opposed to LOS), I would suggest to simply select "Stereoscopic SBS FPV view off" in the custom settings of Freerider. That will of course make the FPV view standard flat 2D only, but that's the way most of us fly anyway. (At least you will not have inversed 3D).