As what I remember Optimize is an ancient anachronism from around 3dmax 2,5 . Messing UV and normals completely contrary to Blender . Not sure why it's still there.
Isn't it breaking custom normals in 3dmax and makes hard edges I would have to fix after? I mean I want to do it on selected vertexes, not just separate meshes ? Max help says it should work on just selection . I wonder maybe I missed something?