Default [Q] HTC One - Italian cid HTC__405 RUU

Hi to all...I wanted to know if there's an RUU for the cid HTC__405, an Italian model.

I've found this:
Is that correct?
I'm S-ON and with boot 1.56...just wanted to return stock when the official Sense 6 update will come...I'll can do it with this exe file on Windows 7?

Or I can do it in an alternative way?

Thanks in advance for any answer!!!
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HTC One Black | HTC__405 | InsertCoin SixthSense