May be I missed some hidden feature but…
It is very nice to be able to return to Hub after closing a project, but….
If I have the Audio Perf Monitor opened, there is no closing the hub, it disappears but the Audio perf Mon window stays open and we don’t quit Cubase.
A ‘Totaly Quit Cubase Button’ would be welcome 
The Cubase Quit button, in my opinion, is the close button of the Hub. The Hub is the parent window for all subsequent windows, including the project view and, of course, the performance monitor. Closing a parent window without its associated child window(s) can only be described as a bug.
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Guys … can we have the ‘Exit Cubase’ button back please??? Clicking the red X always seems like a ‘get out of jail card’.
J out
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+1 for that! Please!
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I don’t have an opinion on needing a close button or menu, but just speaking from a Windows standpoint, the X button at the top right is a perfectly acceptable way to close a window or app. It’s not a forced close or anything like that.
How do you close your web browser? Windows explorer window? Calculator window?
Pete
Microsoft
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By clicking on the “x” of the last opened tab. Or, with the confusion of Windows 11, the previous “X button at the top right”.
Same.
Only the red “X”.
Simple, no? 
The “two ways to close certain things” is one of my biggest rubs with W11. Uggh … I miss Windows 7. Gone are the days of actually feeling like I had some sort of control over my Windows installation.
The x closes the tab. If it’s the last tab in the window, the window closes. The X at the top right closes the entire window, including all of its contents (which may be tabs).
The close button behavior in Windows has been like that forever.
Tab behavior is generally consistent across apps where there’s nothing outside the tab that you would want to retain after closing all tabs. It’s a very common design pattern,
JuniorM was saying that clicking the X at the top right of the window felt more like an emergency close. My point is, it’s not. It’s a normal way to close a window, and for many apps, like the ones I mentioned, the X is the primary or only way to close the app.
I’m assuming you never use more than one tab in any of those apps in which case, I can see how it would feel like each app has two ways of closing.
FWIW, Firefox with tabs on Windows 7, including with X buttons on each tab:
Some folks may remember when this design pattern was popular: MDI
When you maximized those document windows, you ended up with multiple close buttons, which was found to be more confusing.
That was also replaced by tabs, but in a way that makes more sense. Visual Studio is an example, and like the MDI example, but unlike a browser window, it has context and value even when all the windows are closed, so the app itself doesn’t close.
Yes, actually, it is 
But anyway, this is a real digression. All this is to say the “X” at the top of the screen is a normal way to close any window, including the main window, a tab, a docked window, etc. It’s not like right-clicking the app on the taskbar and “end task”.
Pete
Microsoft
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I’m picking up what you are laying down, @Psychlist1972 
.
Anyway … I still miss Windows 7 and the ability to install the OS without all the bullpoughkeepsie (Edit: “B.S.” 
- nice one, forum auto censorship!) that seems to be required now. I still love you, though, and appreciate all of your input on these forums! 
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Hello Microsoft
How do you explain this, what is the logical beyond this workfow :
I have a Cubase project open with the main project windows and I see also 4 mix console windows open on 3 other screens.
I decide to quit this project and click the close button/icon (on the upper right side) of the project window.
Cubase popup a question asking to save the project and I save it. Then a popup appears to comment the various tasks going on to close.
During the save phase, all the mix consoles and finally the project window closed.
Then the Cubase Hub pops up.
Ok, nice to be able to open another project, but I want to quit.
At that time Cubase 15.0.20 presents only 2 windows open : Hub window and the cubase perf monitor on a second screen or in reduced state that I have not noticed.
As I want to exit, I click the close button/icon (X on upper right) on the Hub window.
The Hub disappears but the Audio perfmon window popup ???
Then I the click the close button/icon of Perfmon (X upper right), thinking I am closing the last Cubase Window and quit.
But no chance because the Hub dramatically popup back !!!
So pressing the close button/icon in upper right side of hub has not closed it ???
I press again its close button to really close it, and now every cubase window closes (lucky me).
Is this normal dear @Psychlist1972 ?
This is the reason why I would appreciated a dedicated ‘close all’ button or a fix in the close button/icon of the hub to have it close all the Cubase 's windows and quit.
The behavior you described is undoubtedly illogical and faulty. However, it’s not caused by the Windows operating system, but by the Cubase application. There seems to be some confusion in the hierarchy of the application windows, which needs to be corrected.
An additional button would only fix the symptoms, not the root cause of the error. Modern applications typically don’t require this button because they are programmed so that the “X” button properly closes the application entirely.
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I don’t know.
It will make the things clear : Close all would close all.
Fixing the upper right button/icon behavior in Hub is just a potential bug to fix if we consider that clicking on it should close the Hub…but not the other Cubase windows.
No disrespect Pete, but are you designing something for me or for you?
I’ve been a Steinberg user since Pro 24, a Microsoft Profession and Beta tester. I’d like my ‘exit’ button back.
You take care.
J out
JuellMusic Productions
Home of ATF
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Like I said, I don’t have an opinion on whether there should be a close or exit button. I was responding to the comment about the X button feeling wrong. I just wanted to make it clear that the X button at the top right is not an emergency close or something out of the ordinary.
Pete
Microsoft