Simple Mod Framework

Where exactly can I set this?
Do I understand right, that this parameter supports both platforms at the same time?

UPD: wait, this is for modders only, not for mod users? Shame
Can you implement the same for the users?

I mean if I have the game on both platforms, I would like to use same mods everywhere.
And as I understand, at this point I need to have two instances of Framework to get this work.
Is it even possible to use one single instance but have mods working for both platforms simultaneously?