I have successfully installed PSKiss Photogram extension in Extension Manager for Photoshop CS5 but

I downloaded an extension, PSKiss Photogram for Photoshop CS5. I have successfully installed it through Extension Manager where I can see it is installed. I also have checked in the Program Files (x86)>Adobe>CS5ServiceManager>extensions and it is present there as well. However, when I open up Photoshop CS5 and go to Window, the Extension menu is grayed out and nothing is present or even available for me to click on. I have tried many things but I can't seem to get it to work.