I would like to add an option to a page in Robohelp that the users can give their thumbs up or down if the topic was helpful. Is there a way to do that?
To the best of my knowledge, you would need RoboHelp Server to do that. Otherwise it would require something that your developers could create as it would need some sort of database behind it to record that information.
See www.grainge.org for free RoboHelp and Authoring information.