Well, I should've known I should check this forum! I was cutting out and assembling my half square triangles and realized that what I had didn't work out to be what I would need. So I regrouped, looked at the pictures, and made it work. I could've saved some time and effort by just getting the revised instructions!
That's okay, though. Problem solving is good for the brain, especially my aging brain! I was pleased that I got it worked out by myself. I still will probably download the revised instructions, though. I have all the little one inch squares correctly arranged and ready to start sewing into rows, but I need to wait till my sewing room is bright and sunny and I'm not tired!