Pick one at random and move it to a folder somewhere else.
If everything works fine, wonderful! Archive that folder somewhere and worry about it no more.
I moved pre key to another folder, but found out it is a Red Giant plug-in, so I might need to move Smooth screen and bring back pre key! I hope I can just move it back, otherwise I'd need to download and reinstall!
If you just moved it out, moving it back should restore functionality without any issue. (I mean, you'll have to quit and restart AE, but other than that you should be good.)