I just upgraded to the latest "Cells" (4.4.3.1) from the old version (v3.8.1.0). Now the same sheet will not open and throws the following error: This Excel files contains BIFF7(Excel95 or earlier file format) record…...will open in old version Aspose.Cells Product Family walt_schwarz...type combo box. Currently, Aspose.Cells only supports BIFF8 or greater...