joshua.c.j,
I didn’t find it either at first, but if you go to Dashboard > Tools > Images Cleanup and hover over the index list item at the bottom of the page, you will see options to move/restore/delete all.
opicron,
Great plugin that -almost- works with my setup. My posts have images that are uploaded to the media library and then associated with the post through custom fields (not actually inserted into the post). The plugin seems to recognize them as “Unreferenced Unused Images”. Any way a check for this could be added?