Your actual script should be located under Scripts from the pull down menu in Poser's upper taskbar. The actual folder is entitled DSON Support and within there are 2 commands and a sub-folder. The sub-folder is called Subdivision, and the 2 commands are called Importer Preferences... and Transfer Active Morphs. If you see all of these, then your installation is correct. If you don't, something has definitely gone wrong. The proper hierarchy is Runtime>Python>poserScripts>ScriptsMenu and the folder name should be DSON Support.

And yes, it is a very convoluted procedure, but this is the compromise DAZ has provided for Poser users to import Genesis and Genesis 2. It's either this or the old way of generating the cr2 in DAZStudio and loading that into Poser.