It's my own database for old CRM I developed. I deleted dump about month ago. After recover I tried to import dump file back to MySQL server as binary - this doesn't work. It's strange because Recuva says "No overwritten clusters detected" and icon was green. But I guess it was partially overwritten anyway. Or Recuva saves this file in a different way after recover, I don't know. Same thing with zip archives btw. I tried to restore one zip-archive, Recuva showed green icon, but then I can't open this file with WinRar, it says that file is corupted.