If you use the GroupBy parameter for statistical calculations, the results are not displayed for all polygons in map layer. I fixed this error.
In addition, when you use the GroupBy parameter, it often happens that some combinations of Polygon – Groups have no data for processing. In the resulting table are these combinations listed without calculated results. I added into the setup dialog an option to choose whether empty combinations will be presented in the result table or not.
Current version with fixed bug can be downloaded in the Download section.