Support for the official XDA forum app?

Hi,

I am looking for the right place to get support for the official XDA developer app on android.
I could not identify where I can get this here on the site.

I looked here: http://forum.xda-developers.com/apps
and here: http://www.xda-developers.com/xda-android-app/
but neither provided a clear location where to ask questions about the app.

My question is how to add favorite forums/threads in the app (or on the web for that matter). There is a heart symbol on top the the app screen and I have no idea how to use that.

thanks!