Can't see the VST Instrument Menu in LE 6 on Mac

I have been using Cubase LE 6 on a PC for a while. Just moved to a Mac (OS X 10.9) and installed Komplete Audio 6 hardware and Cubase LE 6 but I can’t see the menu item for VST Instruments any more under the Devices menu, so I can’t select any sounds for my midi channels. What have I done wrong?