Missing Interface Options after 2.4

Hi,

I hope I am at the right forum. I'm just having problems with my interface since the recent update to 2.4.
I can't customize my Interface because the only available option is the Controls options.

Here is a screenshot so you'll understand better: http://i31.tinypic.com/2agm1as.jpg

Only SCT is available at the Addons Tab.
I've already tried deleting WTF and disabling all add-ons but to no avail. I've also clicked Default but still nothing.
I hope you can help me. As much as possible I don't want to remove WoW on my computer because it takes a long time to download everything.

Thanks,
Jklasdf