Finally it did upgrade one of my machines to the new DWC, I think only when I did a full install rather than just the DWC. Not sure, it was real late.
Kind of related to what @Danal was saying, I had another problem with uploading a full set of configuration files. Heres what I did...
Selected all files in configuration, including pause.g, etc Heres a shot of the folder after it downloaded showing all the files...
Then I uploaded those files to a different configuration folder the normal way using the "Upload system files" button, then selecting the download.zip. After it was done it reported 29 files downloaded, and the folder shows the new dates on the files, so it looks ok.
But when I really look only 14 files made the trip, so no pause.G, etc. Which by the way causes some very strange behavior on the printer when they are not there
I can get past this by just pulling the SD card, but it seemed worth sharing, and to get any thought about errors on my part.