The overview of the new features are as follows.
Now you can select/deselect a region by clicking on a face in 3D view.
Now you can set up analysis with mass particles.
You can check "Transient" and "Particle" at Basic Settings to enable particle settings.
When particle settings are enabled, the particle setting GUI will be displayed, allowing you to set the injection, ejection, and wall conditions for particles.
As we had previously announced at exporting on XSim, exporting feature for OpenFOAM 9 format has been removed.