I have downloaded ofxAppUtils, put it in my addons folder but when I run the example that comes with it it still gives me errors saying ofxControlPanel.h: No such file or directory and ‘controlPanel’ was not declared in this scope. Now on GitHub there is a small explanation of how to use this library but it says the empty example should just run. It mentions adding the addon dependencies ofxControlPanel and ofxXmlSettings when adding ofxAppUtils to an Existing Project.
I am confused.

you will also have to download ofxcontrolpanel and place it in to the addons folder on you computer, then add it to the addons folder in you project. if you are using xcode just drag the folder in to the left folder panel.

find addons for download here: http://ofxaddons.com/