Hello Peter
In the StarGo 6.20 SP3 the option "Disable Meridian Flip" must be manually checked.
If you wish to have the "Disable Meridian Flip" option enabled as default you should install the "StarGo 6.1.0 No Flip Beta". Below the link for the donwload.
www.avalon-instruments.com/support-2/sup...o-6-1-0-no-flip-beta
Best regards