Thanks, Stas ... turns out that it was the "bit depth map" (or some such) that wasn't being saved. Problem solved, I believe.

Loving Helicon - it's almost like print development, as you watch your image slowly come into focus on the screen.

But I'm not sure what's going on when I quit ... I keep getting the message "Some results are not saved." which I interpret that I forgot to save something. However, no matter what I ...