Update on Windows to 7.19 - Calibre will not open now

[Duker10]

Today I installed the 7.19 update on my Win 11 laptop. I have no external monitors connected to this system for the window to have disappeared onto (one of the suggestions I have read).

When I double-click the Calibre shortcut, right-click/Run as Administrator the shortcut, or run calibre.exe from within the install directory, nothing happens. I see a small blue circle with the cursor arrow for a second, and then it goes away. Calibre does not open. I have checked Task Manager and do not see any instance of Calibre in the Processes or Services.

I have downgraded to 7.17, 7.11 and 6.29, and none of them will open. Not sure where to go from here.

When I run the command calibre-debug -g this is the output I see

C:\Users\ocpsd>calibre-debug -g
calibre 7.19 embedded-python: True
Windows-10-10.0.22631-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22631')
Python 3.11.5
Windows: ('10', '10.0.22631', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre\calibre-debug.exe