I use sporttracks but in the same importing way as written here.Yes, it does work for others as well-> https://www.watchuseek.com/f233/ambit-desktop-software-669381.html
Nice writeup, anyways!
I created a post with all software that work and may work with suunto https://www.watchuseek.com/f374/suunto-offline-software-alternatives-1359050.html