Choose the Apple menu > System Preferences, then click on Magic Launch.
Click the Disable button at the top of the preference pane.
This will remove the Magic Launch settings and restore the original system settings. Default applications for each file type will stay are, but creator codes will be ignored and rules will no longer be evaluated.
The Magic Launch Agent application will also be removed from this user account.
If you installed the preference pane for all users of this computer (by entering your administrator password), you should perform steps 1 and 2 for all user accounts where file type settings have been changed.
Delete the preference pane. Click the Show All button at the top of the window, then hold the Control key while clicking on Magic Launch. A contextual menu will appear with the option to remove Magic Launch.