PDFCreator using WordPad instead of default program

I have just recently purchased PDFCreator Plus I am trying to use PDFCreator to convert some DOCX files to PDF. My default DOC/DOCX program is LibreOffice Writer. However I see WordPad popping up everytime I convert a file. Because the DOCX file has a bunch of tables, the converted PDF's formatting is all wrong because WordPad is having trouble displaying the document, however it displays in LibreOffice Writer with no issue.

How can I stop WordPad from being used to convert the PDF?

Dear Jordan,

​sorry for the trouble.
​Unfortunately the settings for the default application and the default application for printing aren't always the same in Windows 10 / Windows 8.
​PDFCreator just looks up the default command for printing file type in the registry and executes the command it finds there.
​First it will look at the default/standard value inside Computer\HKEY_CLASSES_ROOT.docx which for me is Word.Dokument.12

​If the value is different for you e.g. LibreOfficeDocument then you will need to replace that part of the next path accordingly:
​The it will look up the command in e.g. Computer\HKEY_CLASSES_ROOT\Word.Document.12\shell\Printto\command
​if there is no "Printto" entry it will check for Computer\HKEY_CLASSES_ROOT\Word.Document.12\shell\Print\command which sends the document to the default printer, but since PDFCreator temporarily sets itself as as default printer if there is only a "print" command, there just needs to be a valid command in either of the two paths.

​For me this points to MS Word but I have also used LibreOffice successfully in the past, if you need the printing command for LibreOffice and can't find it in the online documentation let us know and we will help.

What happens if you right-click onto a docx file and select "print" instead of "convert with PDFCreator", does this also use WordPad or does it use LibreOffice?
​As a work around you could open the documents in LibreOffice and print them to the PDFCreator printer from there.

​Best regards