a project has disappeared!

Hello , I need urgently help , I was working on a project and suddenly , the project disappeared!.

I am very disappointed with AppInventor , I invested many hours of work  in the project and now ... I have nothing !

Can somebody help me? 

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do you use the same Google login or did you log in as another user?

you also can import your latest backup into App Inventor. You did make backups, didn't you? See also why you should do this frequently here http://twodogapps.com/?page_id=686#BackupWork

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