Thanks for considering Aspose.
1). I think you have to upgrage to the latest Aspose.Cells. For confirmation, pricing and other information, please post a query @ Aspose.Purchase forum: http://www.aspose.com/Community/Forums/220/ShowForum.aspx . One of our Sales Representative will ans you soon.
2). The new Aspose.Cells is more reliable, stable and prosperous with enhanced and advanced functionality. I think there is not much labour involved upgrading to the newer Aspose.Cells. However, when you upgrade to the newer Aspose.Cells, Please note:
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.
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.
So you may change your code according. And for more info, please check the APIs: http://www.aspose.com/Products/Aspose.Cells/Api/ and Programmer's guide: http://www.aspose.com/Wiki/Default.aspx/Aspose.Cells/
Hope this will help you.