@maniootek
Try to modify _QPDF_NewLibraryPath_Commercial()
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Case StringInStr($sDLL_FileFullPath, 'DebenuPDFLibraryAX1612.dll')
__QPDF_NewLibraryPath_Commercial($sDLL_FileFullPath, 'DebenuPDFLibraryAX1612.PDFLibrary', '{4C108812-C084-418D-A7D5-0A2632C8406C}', '{88F2FB50-6844-432E-A3A6-840C1259568B}')
Case StringInStr($sDLL_FileFullPath, 'DebenuPDFLibraryAX1613.dll')
__QPDF_NewLibraryPath_Commercial($sDLL_FileFullPath, 'DebenuPDFLibraryAX1613.PDFLibrary', '{7DC849CE-EBD0-4B7C-8A46-A299E9540AF0}', '{99C7568E-DCE9-465C-AC47-35A7913D8725}') ; @TODO QUESTION / TEST : should here be DebenuPDFLibraryAX1613.PDFLibrary or DebenuPDFLibraryAX1612.PDFLibrary ??
Case StringInStr($sDLL_FileFullPath, 'DebenuPDFLibraryAX1711.dll')
__QPDF_NewLibraryPath_Commercial($sDLL_FileFullPath, 'DebenuPDFLibraryAX1711.PDFLibrary', '{B4B2C260-6F9E-4C79-8010-8983CCF3A0A6}', '{68CE66E2-BBBE-4094-965D-7A42243468E8}')
Case StringInStr($sDLL_FileFullPath, 'DebenuPDFLibraryAX1811.dll')
__QPDF_NewLibraryPath_Commercial($sDLL_FileFullPath, 'DebenuPDFLibraryAX1811.PDFLibrary', '{6876E803-14CA-4ABF-9075-24F087AE8868}', '{12146AAC-0348-4A1A-A207-742FAAF8C80D}')
Case Else
SetError($QPDF_ERR_DLLINIT, $QPDF_EXT_PARAM1, $QPDF_RET_FAILURE)
EndSelect
EndFunc ;==>_QPDF_NewLibraryPath_Commercial
Let me know if this modification works for you.