I too do not get the tv menu (most of the time) with the Confluence skin.. Aeon nox seems to work without issue for me.
If you have chosen a unique MAC and have the right server configured in the plugins settings, without http:// , and its still not working then I would say to
1-uninstall kodi
2-ensure all of its folders have been removed as well by connecting with and adb shell and running rm -R /sdcard/Android/data/org.xbmc.kodi
3-Reinstall Kodi 14.1
4-Reinstall the plugin using the instructions posted on the release thread.
If that doesnt work Do a factory reset of your fire tv and try again.