What I'm surprised about is the speed of these complaints. What do these people do - sit and Google all day for possible "infringements"?
This software is for curiosity or nostalga value only. How many people who downloaded this software would have actually paid for it? Answer: zero. How many people plan to use this software in business or for personal gain? Answer: zero. I didn't see any currently developed software besides the Dopus mentioned.
So, it seems the moral of this story is that if you're friendly and generous and let people have a little fun playing with severely obsolete software, you'll get harassed with complaints by deluded "piracy police" who didn't even write the original software in the first place.