The ArcGIS plug-in uses the ArcGIS sDNA environment class, not the Shapefile one.
The QGIS plug-ins use QGIS functionality to output Shapefiles, so may require sDNA to read Shapefiles. Both QGIS ones (like sDNA_GH) require external sDNA installations.
The ArcGIS plug-in uses the ArcGIS sDNA environment class, not the Shapefile one.
The QGIS plug-ins use QGIS functionality to output Shapefiles, so may require sDNA to read Shapefiles. Both QGIS ones (like sDNA_GH) require external sDNA installations.