SurvPC GPS Setup

I am wondering why for the Constellations I only have GLONASS available and not GPS it's recently disapeared from the Configuration for Carlson BRX5, running SurvPC V 6.168 8/14/22
Carlson Software Discussion Group
http://update3.carlsonsw.com/forum/
http://update3.carlsonsw.com/forum/viewtopic.php?f=20&t=4978