Hello husker,
HP does not support those old drives anymore so they dont have the software to download.
Someone posted a copy here but use at your own risk.
Those drives are getting old and its been reported by other users that they are failing now.
I would consider not using the SimpleSave software and only do a non proprietary backup.
Even consider a new drive for backing up to. When that drive fails, you wont be able to recover anything.
Good luck.