If for some reason your library is corrupted and using the built in recovery tool does not solve the problem and you do not have a working backup of your database, then you can try to use the Windows file and folder restore option.
First, make a backup of all your libraries and data files (file.enl and folder.data).
1. Right mouse click on the folder where the corrupted library files reside.
2. Choose 'Properties'.
3. Choose tab 'Previous versions'.
4. Choose the right nearest past date (before the corruption ocurred).
5. Choose 'Restore...'.
See also Microsoft Support:
1. Go to: http://windows.microsoft.com/en-us/windows/previous-versions-files-faq#1TC=windows-7
2. Click on 'How do I view or restore previous versions of a file and folder?' to show the answer and follow the steps.