Following is a link to an updated version of SWHelper. This improves the handling of NHC Regatta Mode internal calculations when there are races present in the file in which there were no competitors for the NHC fleet.
Download the file and replace the existing version which is in the same directory as the Sailwave.exe typically c:\program files\Sailwave or C:\Program Files (x86)\Sailwave for 64 bit operating systems
This version is compatible with versions 2.9.7 to 2.13.x
Jon