AS far as I know,the preamp should always be upgradable with either new software or hardware, that is one of the features of these new class of preamps,most companies offer it.
All the info you need is right on their site, I suspect you have been there? They also talk about some additional features coming down the road, so I don;t see where there should be any problem.
I own the AVP and will also in the near future do the same....good question to ask, what it will sound like and what difference you might be able to actualy hear, when you know it already sounds good.