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This is obviously a false positive (a quick search and the same scanner detected a similar issue in some version of VLC). Virus scanners use heuristics that often pick up on something in legit programs. Not worth much effort to avoid IMO unless there is something obvious that it could be noticing that wouldn't be too hard to work around.
Post edited November 16, 2021 by Adrian__W
Sorry about a late reply, we don't actually receive any notifications when you guys post here.

If you downloaded the offline installer here, this is certainly false-positive. The files that you are referring to are not even built by us - they are made by the GOG team on their servers.

I would recommend using the Galaxy client, as our updates are quite frequent - and it will keep you up-to-date automatically.
Post edited November 16, 2021 by koderski