Update your documentation
The wercker documentation seems very out of date and does not match what is actually on the site. For example, the documentation at http://devcenter.wercker.com/docs/web-interface/application-settings says "On each application you will find the settings page.". There is no "settings" page, and the current application page display shows five tabs, none of which are labelled "Settings" and no one of which has a "Settings' entry. In particular, the item "Deploy targets" described on the doc page does not appear anywhere.