Halion Sonic SE 3 Files MIA

When create a track using Halion Sonic SE 3 the instruments are blank. I have no instruments to select. How do I fix?

It happened to me last night. First, the presets appeared with the “unavailable” symbol (the red circle with a line crossing) next to them, but then, puff, they just dissapeared.

I tried reinstalling Halion Sonic and the instruments, but it didn’t work. What it worked was to uninstall everything, including Cubase, and then reinstall everything again.

Wow! Steinberg must fix this. This is unacceptable.