I think I found my problem. I substituted the folders that I received from the IH2 download for the ones in C:\dev\xampp\htdocs\Store. I should have taken the folders and placed then in C:\dev\xampp\htdocs\Store to REPALCE the original folders instead of SUBSTITUTING the original folders.

I was confused by the instruction in IH2 readme.txt which said "Copy the following directories into your Zen Cart Folder"

Thanks for all your help.