And just wanted to reply:
AFter I did the mentioned above I loaded into my SIm and did some rounds around Dus, Cph and LIs while not going into the main menu but rather to spawn myselve to the other airport with Flightrecorder.
With this I had no stutter or whatsoever. Seems like it might have helped.
Ill do a flight now and come back to you guys later.
greetings