At this time, skwasjer's web site is not responding here mid-USA and I am receiving a "This site can't be reached" error. I don't know if that is because of where I am, or a site error, or something in between. Just in case someone else is looking for S3D, this is to remind everyone that Sailor Steve uploaded Silent3Ditor to SubSim here:
Silent3ditor download
The github link in skwasjer's signature on the first page does still function.