Notes » CornerClick Uninstallation Instructions
To Uninstall CornerClick:
Open the CornerClick prefPane, and under Settings uncheck the “CornerClick is enabled” checkbox.
Click Show All to display the list of all your preference panes.
Right-click (or control-click) the CornerClick icon, and choose Remove “CornerClick” Preference Pane. (Alternately, quit System Preferences and then move the file CornerClick.prefPane to the trash.)