No you don't have to add them, it has defaults. However there is an updated DLL Ankor has done, and this is now included in WOFF UE v4.14 update, so please install that update.
Also we put those settings in - you only need them in if you want to CHANGE the defaults so they are in now, in case you want to edit it (make backups).
I would go one better than that Pol and recommend users implement custom changes as a mod. It is then not necessary to back it up before installing new WOFF UE updates, and much easier to swap in and out as needed.
Anyone needing a basic mod for this purpose can PM me and I will provide it, but the setting options will have to be made by the user.
UPDATE: I have created such a mod and sent it of to Sandbagger for posting on the mods page.