I am considering buying TGC for Skytrak in the next couple of weeks and this question over version has been raised elsewhere and not answered. I was interested in the HB person saying to call Skytrak.
I called Skytrak and they told me to contact The Golf Club. I have just sent a message to the Developer email address and hopefully will get a reply which actually gives me an answer!!
If the revisions are not included then the single purchase licence option will be a bit of a con, as I suspect TGC1 software will have less and less support (and upgrades) over the years.
I suspect it must be included, but you never know!!