FM12. How to rename Condition tags?

I created a condition tag called FISH, and applied it in many places in many files. Now I wish it had been named DOG.

Is there an easy way to change FISH to DOG in all files?

I thought of doing this:

1. create a new condition called DOG in one of the files,
2. import conditional text tags from that file into the many other files,
3. apply DOG to some text, then copy an instance of a DOG condition by Edit>CopySpecial>ConditionalTextSettings.
4. Search the entire book for instances of ConditionalText = FISH, and Change By Pasting.

Would that work?

If it would work, FISH would remain, and I'd have to delete it from every file. Is this still the best way of doing it?

Thanks, people.