Hi,
the issue is triggered by attempting to convert/process a PDF which has security restrictions:
"This PostScript file was created from an encrypted PDF file.
Redistilling encrypted PDF is not permitted"
If you are only processing PDFs, you can work around the issue by calling PDFCreator from the command line with /Printfile=your.pdf
This will skip the printing/redisitilling part and directly process the PDF instead.
However, PDFCreator still shouldn't crash in such a case and we will look into the issue and fix it with one of the next updates, if we can reproduce it here.
Best regards
Robin