SystemDynamics 2.1 is a reworked release of the SystemDynamics 2.0 library. This version is based on Version 2.0 that was developed by Prof. Cellier and his students, and have been primarily updated in order for it to work with MSL 3.1. The diagrams has been corrected from the old graphical definitions and some icons have been added.

• Conversion from MSL 2.2.1: The library has been upgraded to MSL 3.1, including redefined connectors
• Added a unique package icon
• Added a pseudo number generator component