Thank you for your reply,
I checked my key assignments, installed the latest FSUIPC, and I'm back in the same problem.
The Simmu freezes in pause at about 40% of the flight, impossible to get out of it, closed by task manager. Voluntarily I was on autopilot, and did not touch anything.
But I realize that in the log the last two entries are identical, one of which concerns me: Recovery: Flight saved.
As if the system recovered from a backup.
Surely a bad manipulation on my part, what do you think??
I realize, also that if I select the C172, before loading my flight, cer last puts a gran caravan, automatically. I re-select my C172, then.
Edit: I think I found: In recovery Auto save / Save FS / Resume fs / Pause Fs, were checked.
I unchecked everything, I will confirm after my next flight.