Guys, I'm going to mark this one as solved. In reviewing a previous thread I launched on this, once again, I followed Nancy_OShea's advice from 2/21 to reset my DW preferences. And that produces a working DW site with DW's live view displaying my site properly.
I was away from my computer for a week and a half, and my previously defined site was simply not there when I returned today. This, obviously, is a completely different issue. My apologies for not reviewing my previous questions/solutions on the forum so as to avoid unnecessary threads.