Facebook is constantly changing their App creation area. We try to keep up as best we can and, generally, the instructions should help get you going. One thing we've heard lately is that the API access to configure your app, which is required by our Autotune tool, is disabled by default. To fix that, please go to the Facebook App area, click into your app and go to Settings ->Advanced. In there, find the "Allow API Access" setting and switch it to 'Yes'. Once you save that, Autotune should function properly for you.
Autotune is our solution to the problem above. By automatically configuring your application for you, it should remove the need for going into the Developer area almost entirely.
I hope that helps get you going, but if you need anything else, just let us know.
Thanks,
Alex