Slightly OT, but do you need the enabler anyway? As far as I can tell, all it does is set up the CSSU repositories and trigger an update. If you've run it once, the repos are presumably set up (please check) and all you should need to do is run apt-get update, apt-get upgrade.

Someone please correct me if I'm wrong as I do not want to feed BS but this is essentially what I plan to do on my second device.