Corrupt file after having saved and having an error when shutting down the program.

[a.donaire]

Hi,

Yesterday I was working on one of my designs and whne i saved and closed the program it sent me an error message and it shutted down on a bad manner I think.

Today a message showns when trying to open the file and I can't open any of it's versions and neither can I download it from A360 and open it as the error pops up. 

How can I get it to work? I'm really worried as that was the work of my last 3 weeks... If you need any more info or data I'll kindly send it. Thanks in advance.