BIG Help needed - project crashes & crashes

Hi, i´m nico from germany - sorry for my bad english.

The absolute worst case scenario: I had finished a project for a wedding tonight, hat only to export the movie. I saw then that FCPX still renders. But somehow I couldnot see any progress, and finished the program in "hard way". After restarting it, it crashes - again and again. So I copied the crashing project from the project folder in the Finder and restarted FCPX again. Yeah it works.

But - when I go to the Finder, open the crashing project - FCPX fallsoff again. So the work of to days is gone, a i have no movie for the wedding 😟 P.S. I habe no timemachine backup...

Apple support hotline in Germany is no longer busy - I raced here in the same ...

Someone tips for me?