Captivate 13.1 help needed

I am new to working with Captivate 13.1.  Previously worked with Captivate Classic.  

I am not able to regenerate AI text to speech using new voices for testing and review purposes.  I have tried to follow the online help instructions, but the images on the help instructions are from a version prior to Captivate 13.  

What are the steps to regenerate AI text to speech audio using an existing narration script?

Link to Adobe Captivate help:

Add and edit audio in Adobe Captivate | Captivate

Category selected below as a best guess

Thank you in advance