I have installed Anaconda2, and today decided to update to Anaconda3. I installed Anaconda3 at the same time as I uninstalled Anaconda2.
Now, Jupyter Notebook shows this error and quits every time I try to start it.
The path in the error message is: "C:\Users\Hongyi\Documents\%HOME%"
What is causing Jupyter Notebook to quit?

Ycharacter in there... probably messing it up%HOME%should be a Windows environment variable that is resolved by your system...