guessmyOS pluggin

Hi does any body use the handy plugin guessmyOS(which was by hyper9 before it was taken over by solarwinds) . which replace the generic vm icons with os-specific icons in the VI?

I use to use it in 3.5 but it broke after we upgraded to vsphere the error is" the plugin  failed to load on server due to object reference not set to an instance of an object"

any help with this would be appreciated