Settings in shutdown menu gone

Hi

I installed XBMC for the first time a week ago and I love this skin. After playing around with the settings I managed to hide the settings from the main menu, but now I apparently managed to hide it from the shutdown menu although I don't remember changing this in the settings.

After a quick search on the forum (thread 1 & thread 2), I see that this can be changed in the guisettings.xml that is located in the userdata folder. However, I can't find this xml file...

Any suggestions?