Well, the eLicenser program is where you back up the dongle but, you can't back it up since it will remove it from the dongle to the computer. HOWEVER, what I have done, is to backup the dongle to the computer and do a system backup, which back's up the registrations and once it's done, I simply move the registrations back into the dongle. That way, if something happens to the dongle, you simply buy a new one, restore the backed up registrations then move it back into the new dongle.
It's the long way around but it should work.