JDiagram version 4.4.1 contains the following new features and improvements:

JSON Serialization
Diagrams can now be serialized in JSON format. This can be used for interoperability with MindFusion JavaScript diagramming library, or for general storage in JSON files or databases. To serialize a Diagram to a JSON string, call its saveToJson method. To deserialize a diagram back from its JSON representation, call the loadFromJson method. Custom item classes can implement JSON serialization for their additional properties by overriding the saveToJson and loadFromJson methods of DiagramItem. Such classes must be registered for serialization by calling the registerItemClass method and providing a string identifier for the clientClass parameter.

Miscellaneous
~ New createDiagramLink overload of the Factory class makes it easier to create links between TreeViewNode items.
~ Fixed misplaced tracker rectangle in Overview control when Windows resolution scaling is enabled.

If anyone is interested in trying the beta version, please download this archive containing updated JAR file:
https://mindfusion.eu/_beta/JDiagram441.zip

Any comments, questions and general feedback are welcome.