After a little research I can sort-of see what's going on. This WinIAP
utility seems to come from Elan themselves, and a similar firmware
update was distributed officially for an MSI laptop
(https://www.msi.com/Laptop/support/GS70-STEALTH#down-firmware).

Compared to that download, the one from the ROG forum has different
md5sum values for the various executables, but that could just mean it's
a different version, or it could mean there's malware bundled with it.
It's also targeting different hardware, so the firmware file itself is
different.

Since it seems that there are similar issues regarding the touchpad and
suspend/resume in linux and windows, it seems reasonable to assume that
a firmware update could fix it. However, the provenance of the file you
linked is suspicious enough that I'm reluctant to install it (thank you
for attaching your copy though!).

It seems that Elan only expect to distribute such updates via the
manufacturer, so I guess we need to chase ASUS.

Regards,
Ben

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https://bugs.launchpad.net/bugs/1653456

Title:
  ASUS G752VS: Touchpad and Fn keys not working (Ubuntu
  16.04.1/16.10/17.04)

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