If you aren't sure about a file, upload it to a service like VirusTotal or Hybrid Analysis before opening it.
Malware often uses static dates in filenames to appear like a specific "stable" build. If you see "11-17-21" specifically, be extremely cautious. synapse-launcher-11-17-21.zip
If you stumble across synapse-launcher-11-17-21.zip on a forum, a Discord server, or a third-party download site, delete it immediately. Your data and your PC aren't worth the risk. If you aren't sure about a file, upload
It consistently receives a "Malicious" or "Threat" rating in sandbox tests. a Discord server