I remember on the old BikeCAD when it started you had a choice of bike types and then when the riders anatomy was put it, the bike would be designed with the right geometry for him. What has happened top this function?
Bicycle Design Software
You are referring to the Fit Advisor. There is a video describing the Fit Advisor here.
Currently, in the free version, the Fit Advisor is limited to recommending a value for the saddle height only.
In order to customize the Fit Advisor and to obtain recommended values for Rider compartment, Seat tube length, Top tube length etc. You'll need to use BikeCAD Pro.