Pixelcade Art Pack Error, " Pixelcade is not a valid short file name"

Hello Everyone
I was trying to install the artpack l bought from el luigi,l am only getting the error "Pixelcade is not a valid short file name"
I have seen this error in other applications, and it can be solved by registry editing. I checked the Pixelcade forums l am not seeing any workaround.
I am running Win 8.1,with the Wall Art Pixelcade installed.The Pixelcade is working with no issues on Bigbox/Launchbox
Doesnt anyone know how to resolve this?

Thanks for your attention