Can't remove default vst 2.x plug-in paths

The 2 default plug-in paths that Cubase 6 (64 bit) sets cause it to take a long time to load. I can remove them using the button on the VST Plug-ins window but everytime I reload Cubase they re-appear. Is it possible to remove them permanently? Cubase 6 (64 bit). Windows 7 (64 bit).