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You can change the Version number of an Excel file by right‑clicking the file, then selecting Properties > Details, and then editing the Version number field. Please use BuiltInDocumentPropertyCollection.DocumentVersion property to change it programmatically using Aspose.Cells APIs.
The following sample code creates a workbook and changes its built‑in document properties, including Title, Author(s), and the Version number. Please see the output Excel file generated by the code and a screenshot that shows the modified Version number using the BuiltInDocumentPropertyCollection.DocumentVersion property.

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