That's weird, i've had a PC for the last 20 years, and i've been using Windows Security solely for the last 10 and it never false flag anything. (the anti-ransomeware does block every software attempting to modify themselve without express consent though). I've also been downloading games here since 2017 and this is the first only game in over 3 years that trigger that. SO either everyone else here is really lucky, Jackerman suck at coding or the game geniuinely has a virus. I wouldn't say anything if it was a recurring problem happening with most dev here. But HE'S THE ONLY ONE WITH THAT ISSUE! And it's not like he's using some kind of experimental devkit that hasn't been approved. he's using Ren'Py like 95% of all release here.
You need to rethink your view on life if you trust some rando peddling porn online over an antivirus. It's as if you weren't even using a computer in the 2000's. And it's not like it's only one antivirus, it every antivirus who flags it. You sound like the guy who remove the battery from the smoke detector instead of changing them "Because it beep sometime".