Description of the Issue

The uninstaller fails to delete the users copy of tabContextMenu_example.xml because it is deleted while the uninstaller is in the All Users context.

Steps to Reproduce the Issue

1. Install to the default location (and user settings in %Appdata%)
2. Uninstall and say yes to delete user settings.
3. %Appdata%\Notepad++ is not deleted because tabContextMenu_example.xml is left behind.

Fixed by this PR. (Ping @donho as requested)