NW.js App Data Storage

I ran into an issue is week where our NW.js desktop application keep running into the same issue, even after a refresh reinstall.  The user had this application installed on their local machine before.  The answer was that we also need to delete the local app data, store in:

• For Mac OS X,  ~/Library/Application\ Support/SOME_NW_APP
• For Windows 8, C:\Users\%USERNAME%\AppData\Local\Chromium\User Data\Default

Thanks to Mike Ball for the info!