I use the PMDG 777 and 737 on p3d v4.5. Everything was fine. Ran smoothly. But recently I downloaded FSlabs a32x. I tested it out and decided it's not for me. So uninstalled it. After this I noticed that whenever I fly the pmdg aircrafts, they lag and stutter like crazy. I get 20 fps max. Also when the aircraft is in Cold and dark, fps is 40 average in vc. But when I start the aircraft, after irs alignment and initial fmc setup and flighplan inputs, it start stuttering and lagging. Fps drops to 20. How can I fix this?