[ubuntu] "Appearance" lost/removed

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http://ubuntuforums.org – Hey guys, I made a trivial/stupid error and I can't solve it, even google didn't help. Accidentally, while playing with themes, windows etc. I removed the "Appearance" menu somehow. How to put it back/reinstall it? I can't find which app this was... Now I can't even change my background settings :P Unity on Ubuntu 12.10 x64. Thanks (Hardware)