It might also be a technical misunderstanding of interpretation and things are going to be better to Import articulated models from other 3D applications, who knows, it is to see when it will be released, but if, then from my Knowledge it would cause that a V4 would not be working correctly as it is again a totally different way of rigging then a FBX model Import, meaning it is better to keep multiple support rather then to cut Poser to only Poser Unimesh support. A Poser mesh is based on tris and a Fbx is based on simple that is a big difference each can't be interchanged by one click.