AdvGridExcelIO & Excel .xlsx files


Delphi XE7.
I'm trying to import a XLSX file into a AdvGridWorkbook, using AdvGridExcelIO.

It works fine of XLS files, but not for XLSX.

I've installed the Filters, but that hasn't helped.

Is there a way to do this? 

If not, is there another way I can just import the sheets of the XLSX Workbook, and save them locally as cvs files? 



TAdvGridExcelIO is for .XLS files exclusively.
For .XLSX files, you need TMS Grid Filters in combination with TMS Flexcel.