Unable to launch Calibre under Windows11/Surface Pro 7

[Crisppr.cas9]

Hello,

Calibre crashed when my windows session was locked.
I tried to launch calibre again... nothing happened.
As I was on an old portable version on USB, I updated it... nothing.
I updated the 64-bit version on the computer... nothing.

I went on all the steps of the FAQ "Calibre is not starting on Windows" without success.

Here is the result of celibre-debug -g :

...
Turning on automatic hidpi scaling
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 133.6430769230769 x 133.90057803468207
Using calibre Qt style: True
OverflowError: can't convert negative value to unsigned int

The above exception was the direct cause of the following exception:

SystemError: <class 'PyQt5.QtCore.QChildEvent'> returned a result with an error set

[kovidgoyal]

Post the full output of calibre-debug -g

[Crisppr.cas9]

Hello,

C:\Users\benja>calibre-debug -g
Hello, CRISPPR.Cas9!
calibre 5.7.2* [64bit] embedded-python: True is64bit: True
Windows-10-10.0.22000 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22000')
Python 3.8.5
Windows: ('10', '10.0.22000', '', 'Multiprocessor Free')
Interface language: fr
Turning on automatic hidpi scaling
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 133.6430769230769 x 133.90057803468207
Using calibre Qt style: True
OverflowError: can't convert negative value to unsigned int

The above exception was the direct cause of the following exception:

SystemError: <class 'PyQt5.QtCore.QChildEvent'> returned a result with an error set

[kovidgoyal]

You are running from a very old source checkout. Update it or undet CALIBRE_DEVELOP_FROM

[Crisppr.cas9]

Oh yes... that was long ago... totally forgot about it.
Now working.
Thank you.