Grumpy Old Geeks Products PDFpenPro 6 Product PDFpenPro 6 2 mentions in 1 episode A PDF editing app that one host says stopped working after he reverted from a paid upgrade. Mentions 131: The Billion Dollar Show Oct 10, 2015 49:16 I had PDF Pen Pro 6, and I used that to sign PDFs. 49:37 PDF Pen Pro 6 would completely not work.