Delta-763 wrote on Dec 19^th, 2018 at 1:36am:

Captain Sim wrote on Dec 4th, 2018 at 4:23pm: What exactly doesnt work pls? Everything works great till i click on start flight. P3Dv4 closes down at this point. Event viewer lists it as a KERNElBASE.dll fault

What flight is the default flight?
If it's the 757 try:
1. Delete the flight.
2. Set some default aircraft as the default flight.
3. Restart the 4.4.
4. Create the 757 flight from scratch in the 4.4.
Now you can set the new 757 flight as the default flight.

In short, pls do not use flights created BEFORE the 4.4.