Hi,
I have been thinking of adding this option in the simulation. Will probably add it in the near future as soon as I have the time.
Regardless, as long as your PID implementation has anti-windup mechanism, the PID tuning given by the tool should give you a very good starting point in spite of the limits. Then you can just fine tune online to achieve the desired response.
Thanks for the feedback! Let me know if you have more questions.