Hello Ted,
you probably updated Jupyter Notebook. The notebook is no longer opened directly with a URL, but instead through a local .html file that redirects to the URL. That way, the URL with the token doesn't show in the process information anymore.
Try setting the NotebookApp.browser configuration property, or the BROWSER environment variable:
"Specify what command to use to invoke a web browser when opening the notebook. If not specified, the default browser will be determined by the webbrowser standard library module, which allows setting of the BROWSER environment variable to override it."
Hope that helps,
Roland