Support
Email support@usedirs.com with your question, your macOS version, and what you were doing when the problem happened.
Common questions
Some folders show as unreadable
macOS protects some folders. Choose Dirs > Full Disk Access… and follow the steps, or in the App Store version, choose your whole disk when scanning.
The size doesn't match Finder
Dirs counts the space files take on disk, counts hard-linked files once, and doesn't download iCloud files, so its totals can differ from Finder's.
How do I get a file back?
Open the Trash in Finder, right-click the item, and choose Put Back.