Blosm: Import of Google 3D Cities, OpenStreetMap, Terrain

Hello vvoovv,
I’ve just purchased your add-on. I’m a bit confused about how to use it. Hope you can help me find some answers.

-Wiki page says “File → Import → Terrain (.hgt)” but I do not see that option. I see Geo-referenced raster (which has even more confusing options by its own) and I also have osm xml and plain osm imports.
I can import an osm file from www.openstreetmap.org but I was wondering how I can import the terrain with it.
I understand, I need a .hgt file for that. But I don’t know where and how I can download a hgt file of an area.
I’ve generated an API key from Mapzen if that is needed but I’m not sure.

I also tried “Metro Extracts” from mapzen which gives a 200 MB osm file and I couldn’t import it into Blender.

My second problem: When I import an osm file the roads are just vertex and edges( no face) also all the roads seem as highway (objects name) Am I doing something wrong?

Anyway, in short, I was wondering how can I download an area with osm data and terrain and import that hgt file using your add-on.
Thanks