If I recall correctly, 'Wandering File' (zotero-file) and Attanger are the same thing. There was just a naming dispute along the way that caused the former to disappear for a while. And then reappear as Attanger. So it would be somewhat surprising if a feature that was in an earlier version is not in the later version. You could ask the developer @polygon here ... https://github.com/MuiseDestiny/zotero-attanger/issues
https://github.com/MuiseDestiny/zotero-attanger/issues