Avatars does nothing after install

I just installed Avatars (manually, via FTP) and activated the plugin. Nothing in my user profiles changed, no Avatar box at all. Then in searching the community I got quite discouraged. Someone asked about a similar plugin for "regular WP" and was basically told to look elsewhere — does it only work for multisite? If so, that was unclear. What is going on? I'm running the most recent version of WP on my site and tried deactivating other plugins with no luck.