Photozoom pro 4

I have installed the free Photozoom Pro 4 from within photopaint via the get more under the file/export for button. I downloaded it and it now shows up as my owning it in my library. I go into photopaint to use it and I can see it under my file/export for button, but it is not active, it is greyed out. 

has anyone else experienced this and has a solution for me?