I used to have that software for my Citizens, but it has been quite a while since I used it. I don't recall a specific code generator for radii on there, but I could be wrong. I recall a chamfer calculator, a grooving code generator, a threading code generator and a surface finish calculator.
Call Marubeni Citizen directly at the Elk Grove Village IL location. Brian Such is there, and he wrote that software. They can certainly direct you. I have found them to be quite helpful over the years.