After root OTA updates are not available. But Kies download should be available. Still waiting for new Update to test it. If you want root without triping knox best is to keep old bootloader and use root de la vega. I hope hadn't done update to actual firmware. Also keep in mind the updates are an oneway road. You can't downgrade firmware version, or if you keept old boot-loader with a lot of trouble. Problem for KitKat you need new bootloader.
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Galaxy Note 1 - GT-N7000 CM10.2 Android 4.3
Galaxy Note 3 - SM-N9005 Stock Android 4.3