Here are the most common things people look for with specific RimWorld versions: 1. Missing Executable or Runtime Files
Unless you need that exact build for a specific mod compatibility, the final stable version of 1.4 is .
If the .zip file is missing a "piece" to make it run (like a .dll or the RimWorldWin64.exe ), it’s usually because an antivirus program flagged and quarantined it.