helmofs on "[Plugin: WP-Filebase Download Manager] Overwrite File with upload"

Apologize to all for my inexperience, but, I'm using WP-Filebase and have what I believe should be a simple need. I want to set my users up to be able to upload their own file updates for PDFs that they save online. Using WP-Fielbase 0.3.0.06, if the file already exists on the site, a new version is saved and I end up with duplicates. How can I force a file overwrite??

THANKS!

https://wordpress.org/plugins/wp-filebase/