How to determine if something is a false positive in a scan?

On my VirusTotal scans of files I keep running into one scanner finding something. I want to get this writing software yWriter http://www.spacejock.com/yWriter6.htmland I've run the Linux zip file, the .exe file from the Linux zip file and the Windows .exe and VT has returned these three things respectively:

1. Suspicious.low.ml.score
2. Malicious.high.ml.score
3. W32.HfsIemusi.

I read somewhere to drop the .exe file onto hybridanalysis.com but is it safe? https://www.hybrid-analysis.com/

A lot of writers use yWriter6, should I just ignore all the warnings?

And what's the best way to determine if something is a false positive or malware?

Thanks.