I installed the plugin, and went to the library. Oddly, when I opened the regular library, it showed me all my posts, not the media. And all the links - edit/view etc only related to posts. Apparently it was now under the assistant tab.
I decided it didn't fit my needs, so I uninstalled it. It removed all the extra menus, but the media link still goes to my posts. Now I can't get to my media library at all. Meh.
I do have other plugins installed, but I imagine that it has something to do with values leftover in the database.