I had same issue, using Store version of MSFS. I toggled backing off to version 7.4.9 and then back to 7.4.10, and the problem would return each time I reinstated 7.4.10. I will recreate the issue under 7.4.10 and send the FSUIPC7.log. Revised: In my case, under 7.4.10, the GSX COUATL module initializes and the GSX Main Menu hangs indefinitely. Simconnect never connects. I waited several minutes after aircraft loaded and was unable to power on aircraft even after killing COUATL.
Exiting Simulator and collecting log.
Attaching v7.4.10 FSUIPC7.log.
FSUIPC7.log
Test #2 -
I started MSFS with 7.4.10 and have same simconnect issue - unable to power on aircraft. I terminated FSUIPC7 7.4.10 and restarted FSUIPC7 7.4.10. Aircraft still non functional. I then exited to MSFS 2020 Main Menu and created the flight again from the menu. This time all is functional with the aircraft.
I am attaching the FSUIPC7.log from this latest test:
FSUIPC7.log
