Great, But one problem – Custom Texture Maker For MCPE Review

This app is very helpful for the development of my new map that will be released soon. But when I edit a Steve head or just a head in general the texture shows up in my inventory but when I place it or wear it it just goes back to normal. Please help. Or I'm just being stupid and doing it wrong.
Review by Youngcoop05 on Custom Texture Maker For MCPE.