Hello Pierre,
This can happen if you have two versions of Python installed. If you run pip and pip is for Python version 3.10, then it will upgrade 3.10 and not 3.11. Try "pip -V" to check the version. To run pip for a specific version of Python, use "py -3.11 -m pip install --upgrade quisk".
If you have only one Python installed, I will need to check further.
Jim
N2ADR