When installing Hazel 5, it should remove the old preference pane for you. In some cases, it might fail. It’s not a good idea to have both versions running so do the following to remove it:
- Launch System Preferences.
- Right-click on the Hazel icon.
- Select “Remove ‘Hazel’ preference pane”
That will remove the old preference pane while keeping all your rules and settings intact. Whatever you do, do not click the “Uninstall” button in Hazel.