There's only a few items of furniture that I can add to my home - specifically, the ones not marked with a crown symbol seem to be working fine. The rest don't do anything when I drag them onto the view, or use the Add Furniture button, or the Ctrl+Shift+F shortcut.
In this screenshot you can see that I was able to add "Door" and "Door frame" with no problems, and they're highlighted in the menu on the left. Trying to add anything else produces almost no response - it doesn't appear in the table, or the 3D view, and briefly flashes on the plan view (which is the only sign that the Add Furniture button even does anything) but then disappears there as well.
Are these some kind of premium feature? If so, how can I install them?Or failing that, at least hide them from the list so that I don't have to scroll through dozens of models I can't use.