using two different computers I have the same issue:
one is Windows 10, one is Windows 7. In both I have Presenter 11.0
When I try to Publish my presentation, an alert tells me that I need to upgrade my Adobe Flash Player before using that option. When I press ok, Internet Explorer opens (but my default browser is Chrome) on a page where there is a tutorial on how to activate Flash Player. I followed that tutorial, but Adobe Flash Player was already working on Explorer.
I tried doing the same with Firefox and Chrome. I tried closing and re-opening my presentation, I tried rebooting the pc. I tried doing it on a new presentation: still, the alert appears and it doesn't allow me to Publish.
In another discussion, a user suggested that Microsoft EMET could be blocking Flash Player, but I don't have in my PCs.