That was my first thought for fixing and repeatedly even with multiple installs and uninstalls of this and the other add-ins, I have still been unable to get this to work regardless of what order I try or clearing the cache after each step.
I was finally able to get it to appear by tediously going through ever folder in CS5 roaming configuration for any files like IncPU or Pure and then compare to missing items in my 5.5 setup. Something definitely seemed odd with the install as I had tried to re-install and clear cache several times to no avail. Several critical files were still missing. Hopefully everything works going forward.
ONE REMAINING QUESTION...is this supported in CS6 and are there any future dev efforts for this, Multi-Upload and Image Processor? These are great tools and I have not found any comparable products for ASP that work with such ease so I'm hoping they will continue to be supported in future Dreamweaver versions.