Surprised to see no responses to this..... i have the same question. Why does my ForeRunner 405 not show up as a device on the modern site? It showed up on the old site, and shows if you click on an activity, but it doesn't show on the main profile page. Only my vivofit shows up.....
On the upper left side of the Garmin Express window which will show VivoFit, select the down arrow, then select add new device and you'll be able to choose between your 405 & vivofit.
