On Windows 8.1 with Express 3.2.17.0 I connected my Montana 650. The new City Navigator Maps update was shown, I click on Install and got the question for the license acceptation. I did accept, and after that silence, nothing happen.
Normally I should get the elevated program question after this and the download should start, but it didn't.
I "fixed it" by connecting the Montana to my Mac and using Express for Mac. In another threat I mentioned the problem with my zumo 390, but after this Montana try on the Windows computer I did successfully updated my zumo 660 with the City Navigator Europe NT 2015.20.
(to many devices) :rolleyes: