I installed the plug-in and am following the instructions at http://wordpress.org/extend/plugins/add-link-to-facebook/other_notes/
I clicked the Click here to create link and was taken to https://developers.facebook.com/. I clicked the Apps link at the top of the page.
An Admin panel appears. I don’t see anything like the 2nd screenshot at http://wordpress.org/extend/plugins/add-link-to-facebook/screenshots/
I did a search in FB on Create New App and couldn’t find any help there.