Please stop it. It's an update, it doesn't contain anything .exe or .com or .bat. If you upload it to virustotal.com, they don't find anything in 20-30 virusscanners.
On Linux just go to where your saves are stored, delete all the folders but NOT the files, and restart your game. All the folders then get recreated as per your current version of NW.js and the error message disappears. Don't know if this works on Windows but if you copy your save folder before doing it you can restore it easily if push comes to shove.
Remove the web data and the web data journal... this only happens if you use it with multiple nw-s but actually it shouldn't cause any trouble at all... though there are cases where it leads to game crash... just don't know how to produce that
Mario It'samia You are completly correct. It's only caused by 7zip. The winrar archive fron Throbbing_Gristle shouldn't have any false positive.
