I write PHP, HTML, CSS etc and build my own websites from scratch. This plugin is ridiculously over complex for what it does. Even simple tasks like posting articles to facebook profiles is horrendously over complicated - when, in fact, it's as simple as passing the RSS feed from the blog to facebook.
As others have pointed out, there is no documentation or anything to guide people. It merely says "you have to do X to continue".. you get to the facebook section, open graph, app API etc and are just hit with a wall of options and settings with no explanation as to what they do or how they work.
If you're just looking to post from your blog to your facebook. Lookup the RSS Grafitti app on the facebook site. Easy as; feed url, how often, which page is it going on. Done.