Hi Diego,

> without staking too much credit knowing much about this, I believe
> closing the window and closing the app are different in that <....>

Yup, but this has a particular meaning on the Mac since the Mac has a method to have an application open and displaying a menu at the top of the screen even when there are no windows of the application open at all. That situation happens on the Mac because the Mac works with menus differently than Windows - on the Mac the window is attached to a dedicated zone of the main screen at the top independent of any windows, while on Windows menus are part of the window itself.


> The issue becomes, how many different files open simultaneously
> can a single application (MoI Mac or Windows) manage?

There's no particular limit - you can have as many open as your machine has available resources to handle.

- Michael