Yep, you are mislead. Forget about QuickFRX2PDF.App - all you need is just iSEDQuickPDF.DLL
Also note that iSEDQuickPDF.DLL is not an OLE, all you need to do just declare iSEDQuickPDF's functions you are going to use:

DECLARE LONG iSEDMergeDocument       IN iSEDQuickPDF.DLL LONG iDocumentID
DECLARE LONG iSEDLoadFromFile        IN iSEDQuickPDF.DLL STRING sFileName
DECLARE LONG iSEDSelectedDocument    IN iSEDQuickPDF.DLL