Can't get Instrument Songwriter Set to work

I have Cubase Artist 6.5. I recently downloaded Instrument Set Songwriter Kit. I installed it successfully following the Read Me instructions, but for some reason it doesn’t appear in my list of VST instruments - the list does include other instruments such as Symphonic Orchestra, Hypnotic Dance, etc. When looking inside Steinberg / VST Plugins and inside Steinberg / Cubase / VST Plugins folder, I notice that all the other VST instruments have .dll files, but I can’t see any for the Songwriter Kit - if that makes a difference? Or perhaps it is not compatible with Artist 6.5? I’m not sure.

Someone else had the same issue online and was told to look in the media bay of Groove Agent One to see if it is in there, but it’s not.

Any assistance with this will be greatly appreciated.