You have to be careful with this feature, when I used it on a property contained in 2000+ files, on completion of the operation I found that instead of changing the name of the property, it was simply removed from all 2000 files, after which I had to create this Feature Request: Bulk File Recovery.
Take care to create a fresh backup of your vault before doing any bulk operations.
I prefer to perform all bulk operations via Notepad++ – it has never failed me yet.