Why does Jupyter Notebook not start from the package specified in the settings?

Question

IDE

I do everything according to the instructions:
1. Open the command line and enter jupyter notebook --generate-config.
2. A text file C:\Users\username\.jupyter\jupyter_notebook_config will be created.
3. Open this file (using Notepad or another plain text editor).
Find line number 179 #c.NotebookApp.notebook_dir = ”.
4. Change it to c.NotebookApp.notebook_dir = 'C:/your/folder/', that is, enter in
notebook_dir =” the path to the folder from which we want to run Jupyter Notebook. Save and close the file.

Specifically, I wrote in the jupyter_notebook_config file (uncommented the line):
c.NotebookApp.notebook_dir = 'C:/my/'

But Jupyter Notebook still starts from C:\Users\my_name.
What am I doing wrong?