Try this. Extract the NU5T-14G381-AA update to your USB drive.
Now overwrite just the autoinstall.lst file from the Interrogator_AB package from the troubleshooting page, open it with notepad and change this line:
Open1 = SyncMyRide\GB5T-14G386-AB.tar.gz
to
Open1 = SyncMyRide\GB5T-14G386-AD.tar.gz
So you are just changing the last letter from B to D.
That will just run the XML generator, but it's the newer version from the update package.
If the Ford site still won't accept the XML, try doing it from a different browser.