Also, I have to say, for stuff on that's so valuable, Adobe has made the page very hard to find and made the instructions as clear as mud.
First, I'm still not clear on what the difference is between "Functional Content" and "Resource Central Library Content".
Second, as far as I can tell, I never had the problem being addressed by the page (i.e. "When you access the Library panel in Adobe Encore, the panel contains no content."). My library panel always had content, just not a lot of it.
My problem would more accurately be described as "When you access the Library panel in Adobe Encore, the panel contains surprisingly little content.". So the mother lode of content I was looking for was buried as an "Additional Solution" for a problem I didn't have.
And lastly, the Functional Content is some oddly double-zipped self-extracting affair, and the "Resource Central Content is a more straight-forward compressed file, but unlike the Functional Content, it's a .7z file so you have to download a 7-zip compatible decompression tool.
It's awesome that Adobe has that content, so I hate to complain, but it's not so awesome how hard it is find and install.