You should use the specific setup package for your version, such as HEC-GeoRAS 10.8.0.3 for ArcGIS 10.8.0/1.

Hec Georas For Arcgis 108 Upd !!top!! «2026 Update»

You should use the specific setup package for your version, such as HEC-GeoRAS 10.8.0.3 for ArcGIS 10.8.0/1.