Definitely not a false positive. I actually saw the trojan in action. No other suspicious downloads that day. No other problems detected by Windows Defender. And I had no further issues after removing your files.
Do not download this beta, it contains a trojan!
If you have downloaded this, I highly recommend you change your paypal password and monitor your activity.
I literally watched my computer wake itself up from sleep, open a browser tab, and attempt to log into paypal. I ran a Windows Defender scan and found a trojan within this download.
Maybe you got a false positive with our game. I remember avast giving me shit with one of the games executables in previous versions. The paypal thing has to be something else, though. Is there anything else you downloaded/installed the same day or something?
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Has to be something else and it's serious, better format your PC.
Luck with that.