Hello,
Congratulations on the open beta launch!. I hope it is successful and long standing for our simmers community.
Please note that in order for the PTT key to work (if not assigned to a joystick directly - I use F8 and then use FSUIPC to connect to my joysticks - ) the pilot client and POSCON launcher need to be run in "administration mode", otherwise, when the APP loses the focus, the PTT will not be recognized until you select the APP again.
Just a friendly tip learned the hard way :-)
All the best!.
Christian C.