Whoops, please disregard this. When I updated to the most recent version (the first thing I tried), I somehow didn't uninstall the old one and had them both installed. I have actually uninstalled the old one and am using 27, and it works now. Sorry about the confusion.

Hello all, I have been using video thumnails maker for many years and never really had an issue. Recently I have been encountering videos encoded with AV1, and I have found that I cannot get usable thumbnails with this codec: it outputs a plain grey screen (the UI adds a checkbox as if it succeeded)...