Hi, Paul !
At february 2014 i start use this Pack, but when i try it in march 2015, it dont works !!!
i too tried repair and uninstall/install of the pack. Russian speaking M$FT support stuff
recommend write to M$FT developers team, but i'm so lazy

I talk about it with
Nikolay by Skype, at his PC this Pack still works.
He advice re-install Visio, but you know - i'm lazy!