The current libpdcsharp.dll has a missing requirement for "libpthread-2.dll", probably because MingW gcc-4.50 ships with that.
Either this dll has to be included or the built made against "pthreadGC2.dll", which seems to be shipping with gcc-4.6x and also with earlier versions.
Using an older commit of libpdcsharp.dll together with pthreadCG2.dll made it work again.
The current libpdcsharp.dll has a missing requirement for "libpthread-2.dll", probably because MingW gcc-4.50 ships with that. Either this dll has to be included or the built made against "pthreadGC2.dll", which seems to be shipping with gcc-4.6x and also with earlier versions.
Using an older commit of libpdcsharp.dll together with pthreadCG2.dll made it work again.