I followed the steps Rocketboots had, right down to using an older drive. I had SYNC 3 v.1.0 with Nav, in a 2016 Edge Titanium built in spring 2016. I can't take credit for the steps, but I will break it down:
I used a USB stick of 4gb, an older Sandisk, USB 2. Because I wanted to also do a FULL format, I did not want to use a 16gb or larger USB - formatting would take forever. Since the current hub is USB 2.0, I wanted to use a USB 2.0 stick and not a USB 3 stick - just for maximum chance of compatibility.
1) Format the flash drive using the FULL (uncheck quick)
2) Unzip the file onto the flash drive. The file I downloaded had a zip inside the zip, and it was the inner zip file I expanded to the USB stick. When it was done I had two things on the root of the USB stick "autoinstall.lst" and a folder "SyncMyRide". "SyncMyRide" has 4 files in it, all with the extension ".tar.gz"
3) Before starting the Edge, I removed my music USB drive, and my Lightning cable.
4) Started the Edge, waited for the radio to be on, inserted the USB stick. It instantly came up "Updating Software", and then went "indexing" a couple seconds, and then back to "Updating Software"
5) Drove kid to school, headed to breakfast. Listened to radio as normal
6) at about 20 minutes, got "successful update, you can remove the USB stick" - and I removed the stick.
7) Parked, turned off Edge, Opened door until radio fully shutdown (dash was still on) - and shut door. Radio came back to FORD Blue Oval screen once or twice in the first minute or so. Waited about 3 more minutes
8) Started car. A little slower boot up for the screen. Watched the map loading for at least 10 minutes. - had time to read forum and Rocketboots post about another reboot.
9) Shutoff car, opened door, waited a few seconds, closed door. Waited a minute or so.
10) Started car, map was up in about 10 seconds.
11) Ran the car for at least 5 minutes with Nav up and normal functions, and then reinserted my music USB drive, and lightning cable.
Car is fine, and all voice commands are working, nav is working. Not crazy about the slightly smaller font. Pandora mobile app is working WAY better than it was on Ver 1.0
Now to decide if I am going to tackle the USB hub switch.