Open Plots on HOG4PC without touch screen?

Hi All,
So, to open the plots window you just hold down "open", then touch or click "plots". Simple, right? But how about if you're running HOG4PC on a desktop PC that has no touch screen? You can't click "Plots" while at the same time holding down "Open". As soon as you let go of "Open", the buttons on screen change back to their defaults, and "Plots" is gone. Am I missing something obvious? Or is there really no way to do this without a touch screen?
Thanks.
-Mark