Edit "Producer" field in PDF Export

Can’t find this in the export options and it’s not editable post-export.

The default is “LibreOffice inc.”

Problem is that this field is transformed into Asian characters after encryption through my online cart provider (getdpd.com). I realize this may not be an issue with LibreOffice, but I thought if I could edit the field before uploading the file to their system it might solve the issue.

Thanks for your time.

This is best done using an external tool like PDFtk.