P3Dv4.5 default Scenario, Upper Menu Bar select, "ADDON"
Select "Couatl Live Update"
Get the "no data notice", Click OK and then,
Get the FSDreamTeam ADDOn Manager window with 3 choices:
1) Run the FSDT Live Update
2) Read list of changes in this upgrade
3) Ignore this upgrade
This window displays for perhaps 20 seconds then goes away.
(FYI: I've used GSX since at least 2019)