PANGU v4.20 was released on 2017-Jun-30. The surface modeller Java GUI has been updated to improve asteroid modelling support such as the addition of DEM extraction. The rendering GUI has been updated to support non-linear zooming in model-view mode and improved message logging. A full list of changes can be found in the ChangeLog.txt in the installation.
Note that this release has been superceded by the PANGU v4.30 release.