This is a full version 4 release. There are no major new features beyond the many introduced in the v4 beta. The emphasis is on speed and memory improvements in the simulation engine.

Diagram tool behavior is a little more Vensim-like, with fewer clicks required to accomplish some tasks, and the toolbar now includes a pointer to clarify deselection of other tools.

Download a copy with an evaluation license to give it a try, or update your licensed copy.