I am running into big problem.
Just upgraded to Win 11 this past Sunday.
My simulator is P3dv4.5, and I use both FDC 2011 and PF3-ATC.
PF3 is working fine, but FDC2011 disconnects while running the 3rd checklist for pre-starts.
I have re-installed my FSUIPC 6, and that did not help.
Windows 11 won't even let me drag & drop my log files here to help you out.