I guess I need to Revert to an Older Version, correct?
what happens to the deleted files?
am i supposed to put them aside?
will I need to recoup them fromthe trash bin after the patch goes live?
will the patch automatically update once it goes live in EU?
The game will create/download those files once they're needed. And yes, you will be able to patch the game as soon as the patch is released in Europe without having to undo any of those changes.