Jupyter Notebok/Lab

Install Jupyter Notebook/Lab

conda
If you use conda, you can install it with:
conda install -c conda-forge jupyterlab

pip
If you use pip, you can install it with:
pip install jupyterlab

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Check & uninstall Jupyter Kernels

Run jupyter kernelspec list to get the paths of all your kernels.
Then simply uninstall your unwanted-kernel
jupyter kernelspec uninstall unwanted-kernel

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settings

jupyter lab --generate-config
c.SeverApp.root_dir = ‘…ypur path to save notebooks’ # new version
or
c.NotebookApp.notebook_dir = ‘…ypur path’

Clone env

conda create --name new_env --clone pre_env