Current questions and answers regarding the map editor.

I tried to install a mod that adds different dwellings to the editor. But for some reason, when I copied the necessary file into the data folder, nothing changed.

I had the same issue, but Death Knight gave me some obscure mod that added huts. He removed some files from it, and then it worked, but the index.bin file was affected. When I installed NCF, which also contained it, the dwellings disappeared, and I had to extract them onto the map using shared, entering long strings like
MapObjects/_(AdvMapObjectLink)/Objects-Dwellings/Orcs/T6.(AdvMapDwellingShared).