Articulate Ribbon

Everytime I open PowerPoint I get an error saying the Articulate Ribbon has been disabled and asks if I would like to enable it.  I say "Yes" and I then get an "Unable to load Articulate Presenter add-in".  

I have taken the steps recommended in previous posts about the going through the process to correct it:  

File - options - add ins - comm add ins, then select the presenter ribbon and click ok. Before I click "ok" it says load behavior: unloaded.   The ribbon appears quickly without needing to re-start program however each and every time I open power point, it's the same process all over again.  I need the ribbon to be there and stay.  I also have checked the Trust Center as recommended as well.

I am using Powerpoint 13 and Articulate Studio 13.  Any ideas?

Angie