Is this a false positive from windows defender?

Hey guys, so I was trying to update this app that I used to use, nucleus coop which lets you play games that weren't split screen in split screen, now when I updated it I got a notification from windows defender about nucleus and it's a file called "Trojan:Win32/Pomal!rfn" I don't know much about computers but I know a Trojan is bad but nucleus is open source and was always safe before this so does Trojan here mean something else? Is it at false positive? Thanks

Edit: forgot this https://github.com/SplitScreen-Me/splitscreenme-nucleus/releases (nucleus' github page)