I am in a similar boat. I started getting into rc helicopters around 1990 or so and bought 1.3 version of aerochopper for my Concept 30 that I just dusted off. I stopped using the helicopter in 1991 or so. I am just now getting back into rc helicopters again so I pulled out my aerochopper sim and found out that it does not run on anything faster than a 486. It just gives an error when launching it.

I have heard the company produced a 2.1 version of aerochopper that works with newer computers but the company has gone out of business .