Will I have to republish an entire course every time any changes are needed, no matter how small they are?

How do I add audio files to my flow project?
 

Can I view the end of lesson test questions when I create a Flow, vertical scroll project?  When I click preview entire project, I don't see the scored questions that I have added during the Preview, Full Project.
 

Can I create a survey to get learner feedback about my course in dominKnow?

I have create several projects while training and I would like to delete them. How do I delete a project in dominKnow?