Put the FreeImage.dll and cubemod.dll into your Cube World folder (where the .exe is), should be Steam\steamapps\common\Cube World. Click yes to overwrite if needed. Ignore the cubemod folder, that's only needed if you want to modify this mod.
Put FreeImage.dll, cubemod.dll, and config.txt into your Cube World folder (where the .exe is), should be Steam\steamapps\common\Cube World. Click yes to overwrite if needed. Ignore the cubemod folder, that's only needed if you want to modify this mod.