Restored the images & links now function properly.
As for the client editing itself, you can still perform it by placing the files in their default locations. The unencrypted file will be read before the encrypted one so technically modding still works with the older files.
Anything updated since the encryption won't work out. Though because this guide is discontinued and Lunia is dying off, I won't be further investigating the ability to decrypt and obtain updated files. Sorry.