The protectedpdf logo should NOT print when you have unlocked the PDF! It is simple to fix.
This issue only affects Adobe Acrobat Reader DC. It is not common. I am sorry if it has affected you but there is a simple fix.
All you have to do is uncheck one setting (Save ink/toner) in the Print Dialog Box, and everything works again. (It's a mystery but it works.)
Inklingo uses such a tiny amount of ink that most of us would not want to use that setting anyway. That probably explains why it only affected a few quilters.
The quilters I worry about are the ones who have a question but who don't ask for an answer. I am happy to hear from you. firstname.lastname@example.org