Ooops - my approach was for HGT files, not for BRouter, which has its own download anyway.
But to complete the picture for HGT downloads another post from 4 months ago:
Karoutcho ● 4 months ago
I will try Michael version !
I'm not sure I understood how to remove the unwanted dots, though.
Michael Bechtold ● 4 months ago
In Locus POI management you can work with (name) filters and with distance (i.e. a circle around the center of the map) to select and activate points, to get their elevation. For each country, one or only a few circles should do to cover. While you may have a few extra points beyond, but not hundreds.