Apparently, people are belatedly encountering/reading old posts which contain links to old, obsolete versions of Essence#, and then downloading those obsolete versions. Not good.
So I have hidden the download pages for obsolete versions of Essence# from public view. Hopefully, that will fix the problem.
If anyone really needs access to previous versions, just let me know. There are various ways I can provide access on a case-by-case basis.
UPDATE: Actually, instead of reproducing the release notes, I’ve decided to harvest what matters from them and put that information into the official documentation on the Essence# CodePlex site.