I was having a problem renumbering pages so i started all over combining my files (that do not have page numbers or they don't matter in this operation). The very next step i tried to remove them and i get a message that there are no headers or footers to remove. my numbers are plain a day in red in a footer. i'm not using the Bates system, I'm simply numbering pages in a pdf created by combining files. I cannot remove them, i cannot add files and renumber as i've been able to do in previous version. I'm using Adobe Acrobat DC.