This was the first thing I did on a first-time install of 0.6.4. I don’t see a settings.ron file, the only contents are the data\saves folder with a single save file.
But somehow the issue is resolved now, this time I can go into the settings and see the other projection types. The only things that changed were that I played the game for a while and saved my first save file, and I also looked through the tech demos.