Option for Disqus Settings does not appear in list of Movable Type plugins

I've downloaded the Movable Type plugin, unpacked it, and uploaded the two directories ("disqus" and "RemoteCommentsSchema") into my MT plugins directory. Now I'm looking in my list of plugins, and I see "DISQUS Comment System 2.0.6600," but I don't see an option for "Settings," so I can't change the shortname. I'm running MT 4.23-en.

Have I put something in the wrong place? A screengrab of my plugins directory is attached.

UPDATE: I figured it out! You have to go to the plugin settings for each individual blog, not the plugin setting in the overview. Confusing!