The Subject kinda covers it. 
Flow control is called “Extrusion Multiplier” in Simplify3d and is on the Extruder page.
Ay yai yai. It really is still the wild west when it comes to 3D printing. I was thinking, after so many years, that the world of 3D printing would have settled down somewhat. My bad. Anyway, thanks very much for the info. I wonder. has anyone created a cross-reference document that lists what each 3D printing setting is called in all the slicing programs? That might be useful.
I have been planning to do a Cura, Simplify3D, and Prusa slicer cross-reference for a long time. So far I have been too lazy as it is a big job and I have struggled with the best way to film it as a video. Thanks for the push, I will move it back to the front burner.
I would love to help create a PDF cross-reference, but my knowledge of slicers is so thin at this point, I would be more of a hindrance than a help (gotta know your limits…).