Hi Psygorn.
Show me a screenshot of the screen.
If the system does not have the necessary nodes, the editor runs in limited mode, some buttons are blocked.

I have attached the first version of Barry's file, there are only other parameters of the regulators.
If the computer is weak, use the editor in step mode.

https://disk.yandex.ru/d/eyHL_9IQsyIkDw

https://disk.yandex.ru/d/6oFC05cFgf5snA