I ready have my models polypainted buutt now I want to make texture from polypaint but the button are disabled why??? 
So did you try hitting “NewTexture” then “From PolyPaint” and then “Clone” also if you want to preview it on your model make sure that TextureON is highlighted.
If it’s disabled make sure you are in EDIT mode of the mesh.
uhhh
make sure also you are in DRAW instead of MOVE/SCALE/ETC.
Does your model have UV mapping? If there is no mapping, this option won’t be available.
Yes The problem was on the program I update the tool and reactive new texture and already fixed thanks guys