I cannot load any different airport and plane - always the same airport and same aircraft - non ascii windows 10 account name

About CUSTOMFLIGHT
When I start a first flight, the software creates a set of 4 files named CUSTOMFLIGHT (.FLT,. FLT.FSSAVE, .PLN and .SPB) in the CustomFlight folder
C: \ Users \ xxxx \ AppData \ Local \ Packages \ Microsoft.FlightSimulator_8wekyb3d8bbwe \ LocalState \ MISSIONS \ Custom \ CustomFlight.
Then each time I want to start a new flight it is always the same flight (CUSTOMFLIGHT) which is launched!
If I want to avoid this I have to

  • delete CUSTOMFLIGHT files
  • or to save and then reload the new flight but I no longer have access to the Weather forecast in flight.
    Why does the software keep the first flight and not delete it?
    How to avoid this?