I bought 2016 through Amazon in early December only to then find out that the 2017 version was released....I guess I will upgrade later.

I do have the most recent build - 437

So if I have this right, the Xtra Style PAKs I purchased for $49 don't really do me much good unless I also buy multiple (possibly) $79 RT packs? Doesn't sound like a great purchase by me. I guess I will have to research better next time. It is unfortunate that the webpage for the Xtra Style PAKs does not warn you that some or all of the Xtra Styles will not work without the additional RealTrack purchases......