I am using the latest beta of Opus 12. Whenever I open a folder that contains DNG images (Adobe digital negative format) Opus crashes after around two seconds.
It is something I have not done for some time, but it certainly did work at one stage (although I am afraid I cannot recall in which version of Opus) and there is no problem with displaying them in Windows Explorer.
I did think it may be associated with the thumbnails, so I changed the folder format to List, but the problem persists.