Presenter '13 won't "upgrade" PPT file that was created with Presenter '13
I purchased Presenter '13 a while ago. Last week I created 4 PPT decks, didn't do anything to them using Presenter. Today when I click on "record narration" - first time I've done anything with them using the Articulate ribbon - I get the error message: "Your Articulate Presenter project cannot be upgraded to the new Articulate Presenter '13 file format."
But these were only created while using '13.
I saw this support article but it only references files created with '5 or '09. https://www.articulate.com/support/presenter-13/project-cannot-be-upgraded-to-the-new-file-format
I did try moving the PPT deck to its own folder, didn't help. There are no Articulate files created associated with these decks.
Please let me know how to work with these decks and how to avoid this problem in the future.