In a posting there was mention of an attached Excel file that contains the cahnges to the API between 2.4.x and 7.x.x. Do you still have that file available? We are finally looking at upgrading from 2.4.3 to the latest 7.x.
The posting had this text:
"For your complete reference, I have attached an Excel file that contains all the changes regarding APIs that you may come across in the APIs model to upgrade from v2.4.x to new 7.x.x for your needs. Hope, using the attached file you may understand the significant changes in the APIs model now."
Also, you can download and try the Offline Java Demos of Aspose.Cells for Java.
It contains simple runnable console examples which will help you to get familiar with Aspose.Cells for Java API (s) quickly and you will be able to upgrade your existing code.