If I want to use MCEdit on a world which was created with JEID installed, the world is not correctly loaded by MCedit. I don't know why.
But there's a hint from MCEdit: Under the worldname there is the Minecraft version mentioned. At the world which I created with JEID installed is written "Minecraft 1.13-JEID". I have tried to use minecraft 1.12.2 and 1.13 version in MCedit but it don't work. I hope you could fix this problem... If I use a world with NotEnoughIDs installed it works fine.