I’ve’ tried doing a search and replace on the raw text-file of the project in a text-editor like BBedit once.
That only works if the old and new effect have exactly the same parameters (most do)
But it als only works if the name of the new effect-name has the same length as the old.
for example: just change FE to CC wil work.
But some filters’ name has changed a lot: they won’t work becuase when you change that, your file get’s shorter and probably some checksum gets annoyed at you.
Do it on a copy of your .aep file of course:
succes ain’t garantueed, but it’s worth a shot.