The version of garmin express available on the garmin site is incorrect - software.garmin.com/en-US/express-download.html#win
The windows version available on this site is 3.2.9.0 (see file details on the downloaded file)
This page states that version 3.2.13.0 is the latest: https://forums.garmin.com/showthread.php?97023-Garmin-Express-Release-Notes
I'm aware that the post states you should use the app's in-build update feature but it seems odd that the latest version isn't available to download.