There's some sort of funny bug in XaraX. I'm not exactly sure what I did, but it was something to do with dragging an item around the screen and then going over the bottom edge ot the Xara window. At that point the whole program vanishes from the screen as if I had closed it without saving. No error or crash report is generated. Everything simply disappears.
This has now happened to me twice with no apparent reason why.

When I try to do it now, I can't get it to happen. Very strange.