YARPP 4.0.8 not working

Please make sure the settings, such as “The Pool” and “Relatedness” are set correctly. They may have been reset. You can find those panels by clicking on the “Screen Options” tab at the top of the YARPP “Settings” page.

If that still doesn’t resolve it, you should deactivate, delete, and then reinstall the plugin.

Did already. Did the deactivate delete re-install and nothing changed.
Relatedness set to 1 even though most of the post are >8.
If I click everything in the pool, it reformats all of the existing yarpps on the older posts, essentially runs duplicate beneath existing but does nothing to link the newly submitted draft posts to the appropriate related posts. Seems to be pulling only posts from months ago – around May 2013 and earlier and those posts that are not related at all.

A match threshold of 1 will show lots of potential related posts, some of which may be only loosely related. Increase that number until you see the most relevant appearing.

Also, you mentioned “draft posts.” Only published posts should be appearing, not “drafts.”

Do you have any other plugins that might be interfering? To check, turn them off and see if the related posts are more relevant.

Hope some of these tips work for you!