When importing text into Adobe Acrobat DC Pro, it often has single character errors throughout the document. In using your Find/Replace feature, it only worked once for only some of the instances. I think it has to do with your default to "whole word" being greyed out, but honestly this should be a straight-forward feature! It should allow any text string to be replaced throughout the document, especially formatting characters caused by import errors. Also, I did try the redact feature and it did NOT work as I need the formatting to be corrected. Additionally, although I did get a few characters "replaced" initially, I was not able to get the Find/Replace feature to work again, even after saving the file etc. I used to be a systems engineer and this is very simple to code; it's disappointing to see how long this has been a problem feature.