A separate viewer tool.
BS Editor: You need this Viewer if you want to view projects published with Quest3D 3.0e or lower. Any projects or websites published with Quest3D 3.5 or better do not need a separate viewer.
viewers are not needed for stand alone executables!
* viewers are not needed for web sites, the web site will install the viewer automatically. you can free download Quest3D Viewer 3.0e now.