BKKDon,
Wow -thanks for being so helpful! And so sweet about it too. I'm so glad to hear this is all my own fault-that really helps!
And -yes I've done that. Apparently it's NOT easy because it did not work. I'm currently trying to download Lightroom for the third time. Maybe thats the charm?
I've started another thread with the exact issue, as suggested by another kind user of this forum.