Installing WD SmartWare again after restoring the computer should not affect stored data as long as you do not run a new backup if you keep the same computer name since that is how the application keeps track of computers already copied. As a recommendation, it would be wise to have the hard drive completely disconnected while the computer is being restored just as a precaution.
The files in Smartware.swstor are not encrypted, and can be copied out to your computer even if WD SmartWare is not installed.
Regards,
