Pdf Creator 1.7.3 - blank page

Hello everybody,

I have a software that uses pdfCreator 1.7.3 to produce documents. This Software does not work with later versions of pdfCreator.
Now suddenly the pdf-documents are produced blank from any software (Notepad, Word etc.) - no text, no images.
I aldready uninstalled 1.7.3, reboot and reinstalled, but the problem remains.

Thanks a lot for any help !

Best regards,

PS I use Windows 10