With JTB Find you can find and replace text in the Extended Data tab in Properties, specifically for Property Sets and their Property Definition values.
Once installed, the app runs in Trial Mode, with a Trial License. The trial License will expire after 30 days from the first usage. Once you purchase a license, you will get an Activation Key from JTB World. Click "Activate" button to open the Activation Form and enter your Activation Key. Then you can use this app in full functionality.