ST-Sim version 1.4 is now available for download at https://apexrms.com/projects/stsm. Some key features included in this version:

1. The ability to view output rasters directly in ST-Sim through a new mapping window.
2. The ability to generate output rasters for transition and state attributes. 
3. The ability to define time varying attribute values.

Support for the new features in this release has come from The Nature Conservancy and the U.S. Geological Survey.