The package installs the Controller Editor (1.3.2).
It brings Support for Traktor Kontrol S4.
It also brings Multi Controller Support for Traktor Kontrol X1.
This software is the latest version of the backup program that was included on your drive. It contains the Mac version of the backup software.
You will need to register your WD product to download the software. If your WD product is already registered, you must log into the registration service to download the software.