Acer 4315 BIOS v1.18 download. Where?

With my Acer 4315, I am currently stuck on BIOS v1.16.

On these forums, I see that current is v1.18 or maybe higher.

I cannot find v1.18 anywhere, even on the euro site a link stops at v1.16.

Where can I find v1.18 or higher?

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