The Attachment De-Duplifier does not currently require configuration
When attachments of the same name are uploaded to a Confluence page, it makes a new version of the previous attachment.
The De-Duplifier will compare the checksums of the old and new attachments. If they are the same, then we remove the new attachment since it is a duplicate and will fill up space in your Confluence data directory.
Note that this only starts once the app is installed. It does not go to previous pages and clean up attachments.