Run N Generations
The Run N Generations button will cause the genetic engine to breed N new populations of individuals and have the evaluative agents rank them in order of fitness. You can guage how long the process is taking by watching the progress bar at the bottom of the dialog. If you have selected a large number of starting curves or chosen a large number of generations, it may take a very long time to finish.
When the button is pressed, the text is changed to "Stop" and if you press it again the the evolution will be interrupted. Usually it does not stop immediately, it first finishes the generation that it is evaluating. Thus, if you see a design that you are very fond of, you will not be able to get it by pressing stop. However, since there are no huge modifications in one generation you will most likely find something very similar in the next generation.