The choice between getting corrected Plato or what you see in the refractometer on the brewsheets could be made in the equipment settings with a box for "refractometer or hydrometer".
I don't know how the alcohol equations work to "uncorrect" them but the preboil and OG are pretty easy to uncorrect.
Part of the reason I got a refractometer was so I could stop running down the hall to do temperature corrections in the middle of brewing.
It doesn't do me much good if I have to run down the hall to uncorrect Plato (but at least I can figure that out before brewing and write in on the brew sheet).
I don't know how the alcohol equations work to "uncorrect" them but the preboil and OG are pretty easy to uncorrect.
Part of the reason I got a refractometer was so I could stop running down the hall to do temperature corrections in the middle of brewing.
It doesn't do me much good if I have to run down the hall to uncorrect Plato (but at least I can figure that out before brewing and write in on the brew sheet).