Modded materials files .txt not loading completely

So I've loaded some modded materials into the user/appdata/roaming/CDE/data (putting them in data/materials wasn't working) folder, and whenever I boot up Children of a Dead Earth, all my designs end up using the first item in the list for parts previously using modded materials (structural parts end up using aluminum, fissile elements end up using Americium, etc).

I can't seem to get modded materials working by emulating the game folder structure by slotting them into .../data/materials, but it seems to work if I put it straight into the Data folder.