danboi, check and see if you have a subfolder in your SmithMicro programs called PoserPro 2012. That’s where the installer puts the plugin if you let it use the default setting. No, it does not matter that you don’t actually *have* Poser Pro 2012 on your system, it creates a folder and puts it there anyway. So you won’t find it when you run P9. This little quirk is common to both versions of DSON, btw, so you must point it directly at Poser 9 when installing.
ADDING: Just heard back from Mantis: this bug is confirmed. They are going to have to tell the importer to figure out which version of Poser is installed, as Poser 9 does not have Gamma correction and that’s the part of the script that seems to be throwing errors in this update.