I don't have either of these programs, so this is a bit of a guess: If both FSUIPC4.dll and pdfkneeboard.dll are both in the same Modules directory (and I'm assuming they are, but I really don't know) why would the paths be diffrent. If <Path>Modules\FSUIPC4.dll</Path> works for one, shouldn't <Path>Modules\pdfkneeboard.dll</Path> work for the other.