Thanks for considering Aspose.
Do you mean you were using Aspose.Excel previously and want to ugrade to newer Aspose.Cells, if so, well, Aspose.Excel has been renamed to become Aspose.Cells now. The latest Aspose.Cells component is more reliable, stable and prosperous with enhanced and advanced functionality. I think there is not much labor involved upgrading to the newer Aspose.Cells. However, when you upgrade to the newer Aspose.Cells,
Some APIs (classes, struct, enumerations) are added based on some advanced features that we now offer, the previous classes (with their members) are retained and optimised but a few classes are renamed, some additional members (properties, methods etc.) are also included of the classes with a very few excluded.
Following is the classes list which are renamed:
1. Excel class is replaced by Workbook class.
2. ExcelDesigner class is replaced by WorkbookDesigner class.
3. ExcelHelper class is replaced by CellsHelper class.
For more info, please check the Aspose.Cells Documentation with APIs: http://www.aspose.com/documentation/file-format-components/aspose.cells-for-.net-and-java/index.html