Update from Latest official developer: 8.4.19

Apr 28, 2013
as everyone knows, the last one official release it's a long time ago.
when I search for the update is found but then does not download it, as shown in the attached images (in italian)

I would like to know if I can manually update from TWRP, without risks and wipes, to the last one Latest official stable: V9.5.2.0.NCJCNFA from the developer ROM 8.4.19???
maybe a more recent developer?
Thanks to all

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