Endermen can remake the Ender Crystals if they teleport with in a close range of where one was. (Takes quite a long time!)
If the Endermen remake all the Ender Crystals an Ender Dragon will spawn (previous must be dead).
In this version you must have this plugin running when The End is created.
Plugin will make a file in the world folder called "EnderCrystalLocations.txt", this contains the coordinates of where the Ender Crystals were made, it is possible to manually add the locations of the old Ender Crystals if you wish.
