Not preserved the file MS CorelDraw X4

It's just awful... I saved the document 20 minutes ago. Just my CorelDraw X4 took off leaving me no hope of saving.
Opened a backup, it was even stupidly empty. Opened the file itself and the worst expectations were met, I returned with my mountain project on several levels ago.
Please, tell me, what can I do to get back my 6 hours work?
Why in the hellish program is there some sort of fuse in the draft?((((( I'm in shock...