The only "good" thing about the "black screen" problem, the specific problem that was the source of this thread, is that it's specific enough that Alec seems to know what might be causing it.
And the "temporary fix" you provided about three weeks ago did "fix" the black screen, even if it's not an entire work-around. In addition, in case I never mentioned it, while using that "temporary fix," the game not only worked and was visible, but looked incredibly beautiful. There wasn't a single other graphical problem. It was perfect!
So in my case, and in the case of the other people I've been talking to who can't play because of the "black screen," it seems that this may be the only problem, and once that is fixed, then the whole game is a go!