I'm guessing you got the thing saying that it's an unrecognized app and it might put your PC at risk? It does that whenever you download an EXE file that doesn't have a publisher (I'm pretty sure you have to pay to be verified or something). Here's a reddit post I found talking about it: https://www.reddit.com/r/itchio/comments/v3hjpd/microsoft_defender_smartscreen_p...
That warning doesn't mean it is malware. It could still be, but you could check that with an antivirus I think