How to update a rooted htc one?

Hi all.

Running a SIM free international version.

In rooted my HTC one as I needed to install rSAP and a special Bluetooth stack to enable my phonebook to transfer to my Audi.
All is fine..

However, I'm now being presented with HTC updates which I can't seem to turn off, so my question is..

How do I update my phone?

Does anyone have any good videos to point me to also, can I reroot once updated?

Thanks..

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