Finding plugins in CS5

[Ovnjajdla]

I have been trying to install my copy of Silver Efex into CS5. I follow the installation instructions but when I open Photoshop, there is no sign of it anywhere (it should apparently be under the "Filters" tab, but it's not).

Am I doing something exceptionally wrong, or am I just useless with software?
(That's a rhetorical question).

 

[Hoogle]

silver effexs pro should appear in filters>niksoftware>silver effex pro assuming you installed it into the correct host program directory when it instals it gives you the option for photoshop 32 bit or 64 bit