Rimworld.v1.4.3580.zip

A working RimWorld folder should contain RimWorldWin64_Data , MonoBleedingEdge , and the executable. 2. Version-Specific Mods

It looks like you are referencing a specific archived version of (v1.4.3580). If you are looking for a "piece" in the context of a missing file, a mod, or a specific fix for that version, I can point you in the right direction depending on what you need. RimWorld.v1.4.3580.zip

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. If you are looking for a "piece" in

Unless you need that exact build for a specific mod compatibility, the final stable version of 1.4 is . Look in your Windows Defender or antivirus history

Look in your Windows Defender or antivirus history.

If you are playing offline, many modders keep "Legacy" branches of their mods specifically for 1.4. 3. Updating to the Latest 1.4 (or 1.5)

If you own the game on , you can right-click RimWorld > Properties > Betas and select version-1.4.3901 from the dropdown to get a complete, verified copy.