Thanks, Paco. I was hoping that there would be a simple external solution, rather than having to edit the show internally. Using zoomer would certainly be more efficient than having to go through and edit each font height, horizontal, vertical position, etc.
I think, from the research I've been doing, that it has to with the 96 dpi on windows vs. 72 dpi on mac displays, and what that means for font sizes. You can read more about it HERE. Kind of fascinating, really, going back to the early days of graphic design on computers with EGA, CGA, and VGA displays. But while I can change the dpi settings in windows to 72, it doesn't actually affect isadora's display. So I guess internal editing it is...