Archiver module - how to delete files

[jasnick]

Using 1.11.4 and latest Archiver Manager Module

I have it set for keeping 10 revisions but previously had it set for "forever" - an oversight.

I cannot see how to delete the really old revisions.

It says: You can automatically purge archives either by revision count (i.e., keep only a set number of revisions of each page, Global Content Blocks, Stylesheet, and Template) or by date (i.e., keep only revisions from the last n days).

How does one purge the old files?

Thanks!