When I right click on FLAC files, Opus crashes. This happens even when I uncheck the box for "Hide Windows items on the file context menus". I downloaded debugview as intructed from the FAQ post, and it is not giving me any CLSID number as your pictures depict. I am sending my debugview log file so you can see what I'm talking about.
DOpus context menu crash.zip (289 Bytes)
There have been a few of these lately and it seems to be caused by the Icaros codec which is often part of some codec packs.
I just uninstalled K-Lite Codec Pack and I can't reproduce the crash anymore.