Obviously there is no way in heck Garmin is going to support or help people with this
but just to help other advanced power users on older Windows, if you want to try the newer versions of Express that typically will refuse to install/work
just use VxKex-Next
I've been using Express 7.28 on Windows7 for a few days now without any problems at all
VxKex just simulates the missing API calls they are trying to use for Windows10 and lies to the program to tell it Windows10 is installed
Hope that helps someone someday
Of course now Garmin is slowly forcing everyone to mobile-only which sucks but for now we have at least this much