I had to un-install FSLTL after the AAU1 update. FPS went to unworkable. Renamed my old community folder, and started re-loading one mod at a time. Everything was working fine (TBM liveries, P38, Corsair, CRJ, PMDG, etc., and when I installed FSLTL, everything stopped on load. Hopefully an updat is coming from FSLTL soon.