Well i got 6.1 atv on via remote of all places, blue button extended online flash and all went well with install and no software update available so i must have the latest software.
Strange thing is abm 2.8 is still the latest available in download server and some peeps with zgemma boxes report 2.9 abm with atv.
mine was doing the same, i deleted it in plugins, reset gui,went to plugins download and it had 2.9 there to download