That is known issue with Office 2010. There seems to be some incompatibility. That is because in the time of developing the Universal Data Exporter Office 2010 was not available for testing. Developers are warned about this issue and hopefully will come up with an Update. My advice is until that time to use instead of binary export the HTML export.
For restore lost or corrupted xls files you may use repair excel 2007. It has different facilities for resolving out almost every issues with xls workbooks. The tool starts under all Windows OS and system configurations of your system.