Sorry for the confusion. That thread is 2.0 of the old Windows Phone 7 app, which i don't support anymore. Too keep the versions from overlapping in the future, i'm keeping the 8.0 OS apps at 1.x, the 8.1 versions will be 2.x, etc. If you want UI6 support you will want the 1.9.x versions. Just keep in mind UI6 introduced a completely new authentication system called MMS. MIOS is the legacy auth system. In the latest version you can select MIOS or MMS at the authentication type. Let me know if you have further questions. Thanks.
Spencer :-)