All of a sudden FSUIPC5 causes a CTD  of P3d V4 - ucrtbase.dll violation. It did work before. It seems to be a part of vs 2015 runtime Windows 10 64-bit, both FSUIPC 5.10 & 5.101, Prepar3D v4 Academic 4.0.23.21468 Addons: Chaseplane. AS2016/ASCA, GSX, Aerosoft Twin Otter, ORBX Global Base - LC Europe - Libs Installed runtimes: Link Any suggestions ?   Many happy landings Andi