...installing now
One note is if you are a legit dev locked phone, you need to uninstall the Windows Phont Support Tool before it works.
I installed it so I could run that backup tool, and everytime I tried to run the update it would say "UpdateWP.exe has stopped responding...".
Finally figured out I had to uninstall those Support Tools, then re-run the UpdateWP-x64 installer, then ran the update and now its going so far.