You have the choice: you can decide to come back in DS4 with one frame or the whole animation. As Ashfire said: you must have the right VWD version. Animation is not mandatory: sometimes I have a conforming clothe on a posed character and go in VWD for simulation to adjust the fitting, move the drape,.... In VWD you are in an endless simulation to make all the adjustments you need. Of course this scenario is for still render

All you see with Poser is available in DS4 via the plugin (VWD is an "independent" tool working with either Poser or DS4)

The DS4 plug-in is still in beta as Phil said there is still a bug with the subd possibilities in DS4 .