Ah, looks like current V 3.1:
Go to Fish Settings
Click on "New Set". Do not enter any name.
Click on "Cancel"
Click on OK.
Now, go to Fish Settings again.
You still see the "New Set" blank section waiting for you to type in a name.
And
1. Select any fish set. (Refer to this as Set #1)
2. Click "New Set"
3. Enter some name for it, but DO NOT press return. (Set #2)
4. Make any change in that set.
5. Click "OK"
6. Look at Set #1 and notice that it will now match Set #2.
Which may be essentially the same as what David is saying.
Dang - one would have hoped that those fish would have eaten this bug or bugs by now.