Need to fix mistake in PDF with Reader-enabled commenting

We have a PDF of a book that was created with FrameMaker. We want the book to be Reader enabled for commenting so that the users can click on the pages and type their own notes. We did that and had a successful PDF, but then noticed a mistake in the setting of the initial view of the document properties where it wasn't set to open to Bookmarks and Page panels. The person who did the book is saying the Reader-enabling is preventing her from being able to just remove the security (we know the password) and fix the setting and then re-doing the enabling and final security again. Is there any reason she is having problems doing a simple Remove security and doing the needed fix? I do not know the exact version of Acrobat Pro she is using, but I'm sure the Reader enabling is still able to be done on the book. The security settings on the draft with the mistake all worked fine to be able for Reader to do the commenting.