Gem Fix Tools add a button to help you quickly open the OneNote cache folder, and easy to delete the folder.
After installed Gem for OneNote add-in, you can run Gem Fix Tools from Windows start menu.
Located: OneNoteGem -> Gem for OneNote -> OneNote Gem Fix Tool.
In Gem Fix Tools, click "Tools" tab -> "Cache Folder" button.
It will open the OneNote cache folder in Windows explorer.
Press "Del" key to delete OneNote cache folder.