Articulate 13 can't upgrade any of my files?
I upgraded a few days ago from 09 to 13 - and I just now tried to open several of my files and they all gave me the same error message, "Your Articulate Presenter project cannot be upgraded to the new Articulate Presenter '13 file format."
I can't edit the slide properties or re-record narration or publish anything! Help! These presentations took me weeks (each!) to create, I CAN'T start over!!
If 13 won't open my files, can I go back to 09?