Presenter 360 - Where is Menu?

Is there a way to transplant my custom menu to the new PPTA? I ran into the issue of crashing in Presenter when publishing certain upgraded courses that were originally made in Presenter 13. Some could be salvaged by getting rid of a certain animated GIF, but others I need to rebuild in a new PPTX and bring in the slides. What I don't want to do on large courses, is re-do all the menu title names. 

I want to re-name the PPTA into zip and transplant whatever content file controls the custom menu titles. I can see all the guts of the PPTA, but nothing, not even the XML player files, look like they have the menu entries where I could swap it out. 

What file stores the menu entries?