All I remember from January was I couldn't find it in my "downloads" folder but did find it in my network downloads, used my Ford Pass info & it worked for me....that was a couple months ago though.....I wish I had a better answer....I have windows 10 pro & FDRS version 38.5.7
Mine is a 21 XLT PB.
I use the tender no matter what since I don't cycle the ACC, I just leave it turned on throughout, unless I have to use the USB.
I actually had 4 SW updates, took a little under 2hrs.