ZBrushCentral

Freeze?

Hi!

Just playing around with zbrush trial and have 7 days to go.
I have tried sculpting a dragon and been working for a good while now, and I was just going to start moddeling details and pressed something that made zbrush kind of freeze. The small menubar with the brushes is open. I can’t really press on anything, but the interface is still working. It shows what buttons i press, like ALT and so, and when I press shift, it chances the “Focus Shift” to zero on both the menu interface and the interface behind, so I guess its still working. And just realized I havent saved my project yet.
Any suggestions to what could be wrong and how to fix it? (without restarting the zbrush)