I don't think that is necessary, but you will have to be the judge.
The purpose of the text editor, in this case, is to locate all the references to the port address so that you can change the code in the pages you already have.
I have no way to know how many pages you have in your website. If there are only a few pages, it may indeed be easiest to start over. If you have more than 10 or 15 pages, you may want to make the effort to edit them.