I am about to release a app and want to make sure I have done it correct..
If I change it from debug to release do I just submit the release.apk or is there another way to save to apk file? I am also using the licencing library.
You just need the Release or Release(obfuscated) apk.
Make sure you signed it with your own key and not the debug key. This wiki page should be handy. [Remember you can add your own info to it!]