Drag the drive folder into System Preferences/System/Accounts/My Account (the account you're using)/Login Items/
WD Anywhere Backup – How to quit MAC OSX 10.4
MAC is prevented from shutting down by this application after installing.
Simply Force Quit the first time. Maybe even before creating a backup plan as I think it is lost. (It came back, but by then I'd had to create another.)
The next time you boot and create a plan, the application will have enabled the Quit application file menu item.
I didn't have this problem in OSX 10.5, and a different version was available.