The default setting for Duplicate Files is to Excludes Recycle Bin and System Volume Information, but Directory opus does not find any duplicate files when these exclusions are active. I have to delete these exclusions for Directory Opus to actually find duplicates in the folder(s) I selected.
Confirmed. Looks like it got broken with recent changes to how the exclusions work.
Thanks for reproting it!
That's fixed in the next beta. Thanks again for reporting it.