First of all, as @ccstone says, absolutely do put the path in a global variable, so you only have to change it in one place. A lot of us use the convention of prefixing the variable name with DND_ or DND__, which stands for "Do Not Delete" (in fond remembrance of @JMichaelTX).
I don't know if it would help to use my macro set KMET or not. You could do a search/replace using it, but probably only one macro at a time, so like I said, I don't know if it would be helpful or not.
Personally, I could write a JXA script to do the trick, but I wouldn't take the chance with someone else's macro library. (Not sure why I'm even mentioning that.)
Sometimes it's better to just bite the bullet and do it manually.