In order to save the results (redirect link) you need simply press on the arrow button within the line (or press "Enter" after you've typed the URL in the field). I've attached a screen shot in order to be more specific. After that you need to make some action (for example press on the link object or relocate it a bit) and "Save Changes" feature would be activated. You need to save & preview the results. It must work just fine then. Thank you for understanding.