There is. The way to back-up teachers versions of Audio Exams is to use email. Just, click the envelope icon at the lower left of your Creator window. This will let you email your teacher version of the Audio Exam to yourself for storage on your computer or anywhere else you want to save it. Later, you can bring it back to your iPad by emailing it to yourself and opening it. This will be your teacher version so you can use it as-is or change it before rebroadcasting it. You and your fellow teachers can, also, use this feature to share exams.

To learn more read the article: How many tests can I save? In the "Help & Feedback” section

From the Audio Exam Creator or Player app:
(1) click on the info button (i), in the corner.
(2) see the "Help & Settings" window.
(3) click on "Help & Feedback”.
(4) searched the help topics by typing a word or two about your question or problem in the search box, for instance, “save”, “text”, "security", “network”, etc.
Note: The fastest way to send me a message is to tap the "Send us a message" button and type a question or describe your problem.

Mike

I agree! My IPad crashed and I lost everything.