How to Restore WD SmartWare Icon

Whenever my Windows XP desktop crashes and restores, the WD Smartware Icon NEVER reappears.  This makes it impossible to safely “unmount” my “My Book Essential” external drive.  Can someone PLEASE let me know how I can restart the WD SmartWare Icon WITHOUT rebooting.  This is a big time waster for me since I have a lot of resident programs to restart during rebooting.