[SOLVED] "Install from ZIP" option missing

[Dant100]

Hi all,

New Xbian user here and I'm going round in circles trying to find out an answer to my question. I've been googling and searching the forum all day.
I am running v.1.0a5 and am trying to install the superrepo.org repository. I have added it as a source and can see the zip files to add the respective sub-repos in the file manager but that's as far as I can go.
Any info I can find on adding repo's or anything else suggests simply doing the following:
"System > Addons > Install a ZIP file”
My problem is that I don't seem to have this "install from ZIP file" option available. I've been going round in circles in all the menus to see if it's just me missing something but cannot find it. Is there something I need to do first to enable this?

Any help much appreciated so I can get back to studying like I should be doing!
Apologies if this has been answered somewhere before.

Cheers
Dan