Kontakt 8 GUI crashing the VST Hosting app…

Turned on the PC this morning, loaded up the VST host (Camelot Pro) loaded in the Kontakt 8 VST3, all good UNTIL I went to open the GUI to adjust the instrument. It immediately crashed the host, and even after subsequent restarts and turn offs etc, it still does it. Does not crash the PC when in standalone, only on the host. And ONLY when I open the GUI for the plugin.

Was running fine yesterday afternoon, when setting some of the songs up.

Can anyone help with this please? I do want to use the PC for a stage rig, but having this “flakiness” does not inspire confidence!