This was just the first thing that came off the top of my head and aff course you are right on the 32bit. However thinking of another angle:-
Company X makes a product: Eg a 3D dataset graphic analysis program. Say like AMIRA or a graphics package like Adobe Photoshop (both software like VRPC). Along comes another company eg Armbase (well the other company armbase are part of). They develop an orthogonal slicing module for Amira or a single channel chromatic aberation module for Photoshop. They sell the Amira module for 500 dollars or the PS plugin for 200dollars. Should they then contact TGS and Adobe to let them into how this was done? (note correct punctuation) I don't think so. It would be commercial madness. However, if Biorad Amira or Adobe wanted to licence the application as part of their suite of applications then OK. (In fact Biorad did tis with ImagePro+ and sell it with their own name) Many companies licence the AutoQuant module for their application.
Stuart has done the same. He has developed an extension to a product and sells it as part of "his" product. I cannot see why he should let his hard work out in the open.