Here's what my screen looks like after closing a Cubase project: Seems so simple. Now I go to Command-O to open a project.
"multiple instances" - of the application, Cubase? Or more than one <project>?
This is with two projects 'loaded', one open. I mean activated. On this thing, which is previously owned, everything opens up in tabs. This is a new one on me. At first I found it very annoying, now I'm used to it and it makes window management pretty darned simple. I click on the other tab and 'activate project'.
So I have no idea what goes on there with those things, or some effort to make Windows seem more like a Mac. It seems complicated now that you describe it, but I don't know any of those things. Last time I used a Windows was Vista when it was new, at the U of Az 'computer lab' and the second day they had yellow police tape around all the windows boxes because it all had to be shut down.