I believe that if you open the action script in explorer, move it to another folder, them rename it and reimport it, it may just put everything back together for you.
Maybe not though as Im a noob and only used custome actions made by others.
Good luck with it.
(edit to add: when you rename scripts make sure you rename the bit that has the title in the beginning of the script too. Lol Its funny that Im saying this as a none scripter but that is one issue I had a lot when renaming/duplicating scripts, back when I tried to script).