How often is portable Aurora updated?

I've been using portable FF Release for quite a while. I use Aurora on my laptop at home, and would be more than willing to give the portable aurora a shot. I'm interested in knowing, however--how often is portable auorora updated? it is normally updated every morning (the installed version). I'm wondering how often the portable version of aurora is updated. The reason why I'm asking is that the beta portable is still on version 1 or 2, although the installed version is at either 10 or 11.