Sorry to disappoint you, Carl

Yes, that file exists. As do all 11 usu and seo files which should be in the /includes tree.

After I started over, doing a complete fresh install of the plugin I methodically ftp'd directory-by-directory all files into their respective directories. BTW, by fresh install, I mean install of THIS version of the plugin -- I did not have an earlier version.

You gotta work harder for your pies than that, mate!