I have a question about Aspose.Slides. In our application we’ve opened and re-saved a number of PowerPoint files in version 8.1 of Slides.
We’ve now upgraded to version 8.4.0 of Slides and when I open, add a few slides, and re-save the older PowerPoint files, they become watermarked with the evaluation text (saying that the file was created in version 8.1).
In both versions I’m using the same software license (for the Total package and using .SetLicense with a memorystream to do it). This obviously wasn’t a problem before and it’s not a problem when I’m opening, editing, and re-saving new files.
How can I avoid this happening with PowerPoint files that were created with older versions of Aspose.Slides? Am I able to upgrade my application or am I stuck using version 8.1?