Are you unable to do that for some reason? Here is a direct link if you can't find it yourself.

I think GOG/Bethesda should release a changelog, but I think some people are also a bit paranoid here for multiple reasons:
-It is not that unusual for GOG and Bethesda to release a patch for a game on GOG without providing a changelog + "Restarter.exe" is also included in the Steam version (confirmed with my Steam installation of Prey)
-Since release the download for Prey has been removed multiple times and then re-added with the same version number: 10966486/1158493447 (originally added on 27-05-2020, See GOGdb). The last Steam update was on 23th of July 2020 (SteamDB). Prey was updated 5 days ago to version 12742273 with an accompanying patch (if there were malicious practices in play here, I highly doubt they would go to the lengths to make a patch).
-Point 2 points possibly to the possibility that the GOG version has been outdated ever since it released here and has never been updated to the very latest version until now. But well, that last patch on Steam (https://steamdb.info/depot/480491/history/) removed the game's Denuvo DRM (https://steamcommunity.com/app/480490/discussions/0/4150581887545710507/ and https://steamcommunity.com/app/480490/discussions/0/4149455258720610883/), so maybe they are now just bringing parity to both the GOG and Steam versions (while still integrating GOG Galaxy, overlay, cloudsave support etc.). Maybe so that they are thus now file-wise the same to avoid maybe some bug they found in the GOG port done earlier in May 2020 (could have been outsourced) instead of the DRM free Steam version from July 2020? (likely done internally)

Not that long ago, Dishonored (a long finished game that like Prey (2017), was also developed by Arkane and published by Bethesda) received an update. All that was added was unwanted Bethesda telemetry (that caused an increase in crashes for some people). If your existing version of Prey is running perfectly and you don't want to risk breaking it, then bearing in mind you can't "rollback" offline installers to previous versions after you've deleted them, it's best to not start replacing known working installers with newer ones update purely for the sake of version number chasing unless there's good reason to (and unwanted 3rd party telemetry isn't).

There's no point to do that, ever.. unless you can't run a second .exe for some reason. You can just download patch installers instead if you really want an update while offline.

i agree. plus: the update breaks many mods.

an update to the (probably) false positive av-messages: at the beginning of this thread 4 av-tools got angry. now we have 16 av-tools with an alarm. thats much. on the other hand, kaspersky for example is one of the first who removed their warning again. i think the others are just slow.
but it seems like they added really weird code to the 'restarter.exe' that made so many av-engines angy. telemetry is one possibility.

So apparently, 'restarter.exe' is a file present in other installations too, steam for example. I found one post on the steam discussions and it seems its needed to run prey and its expanison

https://steamcommunity.com/app/480490/discussions/0/1694923613872532882

Also, I did a bit of googling on this particular executable and managed to find this article on it. Though I still don't know what to make of it, not until GOG gives an official statement on this update

https://www.winosbite.com/restarter-exe

For now, I'll be temporarily uninstalling it from my system until there's some concrete answers on this big update