Thread:Sinthorion/@comment-25359794-20150214160833/@comment-27723099-20150215015312

MCEdit has some kind of support for modded dimensions but it will only check folders that are named like vanilla dimensions (DIM). This mod doesn't use this vanilla conventions and the Middle Earth dimension folder is named "MiddleEarth".

I renamed this folder to "DIM100" and then loaded the world in MCEdit. This way it will appear as "Dimension 100" in MCEdit. You can do your edits and then you rename "DIM100" back to "MiddleEarth".