Seems to be working fine:
Holocraft does not "convert" models to SVG, it generates groove optics from a model, which can be output as SVG lines/arcs/curves or as Mach3 CNC G-code, but it's up to the user's discretion how optics are generated: the perspective of the model, which metric to generate optics by, etc.
Are you creating any optics? Are you saving the file to a location that doesn't require administrator privileges? Now that PixelCNC has reached a relatively solid and decently featured state I was going to change gears to start making videos to demonstrate it and show off its capabilities, perhaps it would be a good idea to make a Holocraft tutorial video as well.