Keyshot 8 won´t import when "keyshot8_render"

Hi!

Im having trouble with keyshot8 and transfering models between rhino and keyshot. It works first time writing “keyshot8_render” on a model but if I update the rhino file and type it in again. Only the new polysurfaces appear, the old ons disapear?!

You’ll probably want to take this up with the makers of Keyshot.