Accessing fitting_height method

Is there a way to call the fitting_height method of Window_Base without creating a < Window_Base subclass and without overwriting?

Also, what's the difference between refresh and update methods in the Window classes?

I'm not sure how to answer the first question. You need to create the instance of Window_Base (or its subclasses) and call the function. fitting_height mainly aimed to calculate window height when you're making window.

For the second question

Update is updating the window, like blinking cursor or opening / closing animation

While refresh is to refresh the contents if need to be changed. Like information update.

Thanks Theo. As usual XD