So I give up, I won't say I tried everything but I definitely tried a lot of things...
I'm getting the good old R6025 -pure virtual fonction call error for no apparent reason really, it started one day and from this day on I keep getting it every single flight.
For reference it started happening on P3D v2.2 and it's still doing it after I installed 2.3 (the full installer not the patch)
The usual log :
Faulting application name Prepar3D.exe, version : 2.3.11345.0, time stamp: 0x53e4d8e6 Faulting module name: MSVCR100.dll, version : 10.0.40219.325, time stamp: 0x4df2be1e Exception code : 0x40000015 Fault offset : 0x0008d6fd Faulting process id : 0x1698 Faulting application start time : 0x01cfb72124798bd0 Faulting application path : I:\Program Files (x86)\Lockheed Martin\Prepar3D v2\Prepar3D.exe Faulting module path : C:\Windows\system32\MSVCR100.dll Report Id : 7b065385-2316-11e4-b6e6-5404a617f61c
I've tried everything I already found about this error and nothing worked.
So all suggestions are welcome even the craziest ones!