Jupyter under the WinPython environment has a batch file in the scripts
folder called:
make_working_directory_be_not_winpython.bat
You need to edit the following line in it:
echo WINPYWORKDIR = %%HOMEDRIVE%%%%HOMEPATH%%\Documents\WinPython%%WINPYVER%%\Notebooks>>"%winpython_ini%"
replacing the Documents\WinPython%%WINPYVER%%\Notebooks
part with your folder address.
Notice that the %%HOMEDRIVE%%%%HOMEPATH%%\
part will identify the root and user folders (i.e. C:\Users\your_name\
) which will allow you to point different WinPython installations on separate computers to the same cloud storage folder (e.g. OneDrive) where you could store, access, and work with the same files from different machines. I find that very useful.