I ordered and downloaded the Twilight expansion less than 3 hours ago, through Stardock Central. When I first booted it, it told me I needed to update the basic GC2 to 1.8 or higher, and I recall momentarily seeing a higher version number displayed on the splash page.
But now I'm seeing:
v1.80c Twilight of the Arnor beta 1
When I look at SDC, I don't see 1A being listed as available to me.