.settings/winpython.ini
WINPYWORKDIR

.scripts/winipython_notebook.bat
@echo off
call "%~dp0env_for_icons.bat" %*
cd/D "%WINPYWORKDIR1%"
"%WINPYDIR%\scripts\jupyter-notebook.exe" %*

cd/D "%WINPYWORKDIR1%" should be "%WINPYWORKDIR%", rignt ?

Winpython64-3.9.2.0 and Winpython64-3.9.4.0