Ok sorry to ask yet another question but I'm trying to edit a map from a mod, and can't figure out how. In the mod's assets folder there are tbin and png files, and I tried extracting them but nothing happened. Using them as-is in Tiled just comes up with an "unsupported format error". I've only ever edited maps with xnb files, so I don't know how this works.
You need to enable the tbin plugin. See this page for information on modding maps, but do be warned that it is considered an advanced modding topic.