To install unzip and place this script into the following folder:
Edit - Preferences -Startup Scripts
At the bottom click the "Reveal Button" this will open the folder where the script should be placed.
Close and restart Bridge.
This script will add or replace a Keyword with another of your choice.
If the "With" field is left blank the Keyword is removed.
The best way to use this script is to select the documents that have the Keyword that you want to change/remove/add then you can run the script:-
Mouse Right click (menu) and select "Add-Replace-Remove Keyword"
NB: The "Replace" field is case sensitive!
If you run it on all documents it will take ages!
Run it on selected documents that contain your Keyword or where you need to add keyword!