So I actually did this, and I was told that BS1 and BS2 are “different games,” they don’t offer upgrade keys anymore, and if I want to play BS2 I can buy the module for DCS World, which I am not likely to do, since paying $17.50 (which is the cheapest I think I’ve ever seen it go) for something I paid $50 for in 2019 dollars already is kind of a non-starter for me.