JDiagram version 4.3.2 contains the following new features and improvements:

Export Excel files
The ExcelExporter class from com.mindfusion.diagramming.export package exports diagrams to Excel Open XML format (XSLX). Diagrams are exported as Excel AutoShapes drawings. The export() overload that takes a DiagramDocument parameter creates a sheet for each DiagramPage in the document. The export(Diagram) overload creates a single Excel sheet.

ExcelExporter ex = new ExcelExporter();
ex.setTemplatePath(
    templatesFolder + "/ExcelTemplate.xlt");
ex.export(diagram, fileChooser.getSelectedFile().getAbsolutePath()); 

Miscellaneous
Improved back-buffer allocation code. The memory footprint of the diagram should now be much lower and drawing should be slightly faster.

If anyone is interested in trying the beta version, please download this archive containing updated JAR file:
https://mindfusion.eu/_beta/jdiagram432.zip

Any comments, questions and general feedback are welcome.