After the update, I tried flying the KSFO/KSAN route. I own the Flightbeam Studios KSFO scenery.
While stationary, the frame rate was better, but as soon as I started taxiing, the frame rate plummeted—dropping even further during takeoff—and there was significant stuttering.
I had to abort the flight. I then flew from KSAN to KLAS using the default MSFS scenery. The frame rate was better, but there was still stuttering during taxiing and cruise.
There was a lot of stuttering during the cruise phase and a drop in frame rate whenever I moved the camera. During descent and landing, the frame rate dropped and stuttering occurred, making the landing extremely difficult, if not impossible.
Once the aircraft came to a stop on the ground, the frame rate became very good.
Consequently, I consider the aircraft unusable at this stage, which is very frustrating given the price paid.
I hope this is addressed and improved very soon.
It is hard to understand how an aircraft can be sold when it is not in a state to function properly.