Two Unity Icons Cause Confusion

Hi, Just a note from a usability stand-point. I'm starting to learn Unity and am often jumping back and forth between Unity and a tutorial. So, you can imagine my beginner confusion/frustration every-time I try to Cmd-Tab back to Unity and I have two options. A black Unity icon or a white Unity icon. Which one do I choose? They look very similar but obviously have two separate functions!

A better case would to be to hide the hub from the Dock and Cmd-Tab menu until it's needed, or at least give the user that option. In my mind it makes no sense to have a hub and a file open. Adobe, for instance, will just keep its Creative Cloud App up in the menu bar but not have it in the dock, with the option to quit it entirely to save resources.

You could also try using more distinct icons for these two spaces.

Thanks for listening to my feedback!

I did find this possible solution(unity forum link) to the problem, but again, this isn't very user or beginner friendly.

Here's an image of the option I get when Cmd-Tabbing, looks the same in the dock...