I was logged into my other Facebook account, and authorized the plugin on it, instead of the account I was supposed to use.
Now when I change the app ID and stuff, and click authorize, I get an error - it's not taking me to facebook page. It asks me to see the FAQ.
Marcel, can you give me the names of tables created by this plugin, and where they are created (inside which table)? I would like to uninstall the plugin completely and install it again.