They did do a major scaling update with A6, if you remember A5 (the old "A Gift") one, when importing models to Wings3d or Blender you had to scale way, way, way out just to see it! They were huge back then. Wings3d has about the same stock scaling as 3DSMax and Blender, and now the models import to about that scale, although stock Sculptris models seem to import just under the grid, rather than on top ??? .... Try using the Import/Export functions, rather than GoZ. There's been many other complaints about GoZ and Sculptris.