VST Plugins (e.g Halion Sonic)

As follows: iMac, Lion, Cubase 6, Halion Sonic
Have reinstalled Cubase 6 and Halion Sonic(HS) but HS doesn’t show up in pluginfo nor as VST instrument.
I can only see HS LE. Can someone tell me about plugins (VST, VSR2 and VST3) and the paths.
Were can I read about it?
I’m a kind of newbee. :question:
//regards hassogava