Instrument tracks not showing up.

When I try to load an instrument track from project>add track>instrument nothing shows up in the instruments browser presets. Anyone else encountered this problem? I am using Cubase Essential 5.1 and Win7x64.
Edit: now all the instruments are listed, but when I try to load one CE5 crashes. I’m quite sure it’s HALion One thats causing CE5 to crash, but when I tried to reinstall it I still have the same problem.