Camera Raw adjustments not saved, tif thumbnails won't open

I downloaded the horrible new (12.3) version of Raw, hated it with every ounce of my being.  I switched back to the old version.  I culled and made adjustment to an engagement session and saved the files as tifs.  First issue, the thumbnails won't display, and I have checked thumbnail size handling in prefences and emptied cache and neither of those things helped.  So this moring, I decide to delete those tif files and resave.  However, none of the adjustments made in camera raw were saved.  I am livid.  I have no idea why or how to fix these issues.