I also have the problem of not seeing the Update Manager window when it first starts up, and I found if I click the icon in the tray once it does nothing visible but if I click the icon again the window appears as it should.
I also have the problem of not seeing the Update Manager window when it first starts up, and I found if I click the icon in the tray once it does nothing visible but if I click the icon again the window appears as it should.