Python not found

[unitrix0]

I get this when I try to start it:

PS C:\Program Files\Raspberry Pi\Pico SDK v1.5.1> py C:\Users\mr\Documents\Pico-v1.5.1\pico-project-generator\pico_project.py --gui
Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases.

even though I get a python shell when I execute py or python without parameters. I have no idea what I did wrong...