TBE Scheduled Reports in xlsx format?

Summary

Is it possible to have scheduled reports delivered in xlsx format, rather than ancient xls?

Content

Does anyone know if TBE scheduled reports can be delivered in 2007 xlsx format? The only option to select while scheduling the report is "Excel Document"; however when running reports, I can select xlsx, so I know the functionality exists.

We have moved to Office 2013 and xls will no longer open for us unless we first save the file in xlsx format.

Thanks,

Nick