Choose if you use ECE and want to use its "Vertex Edit" feature. Vertex Edit is disabled for boys by default. Originally the male ECE Vertex Edit was made to conform to the adult male head mesh, but because I am using the female ECE head for both genders - male and female - I had to tweak this file. ★ If you choose this option, it will disable VertexEdit for adult males. It won't crash your game, nor is it gamebreaking or anything, but VertexEdit will simply not work on adult males when you try it.