Swift_chubby_engine.7z.001

Ensure you have .001 , .002 , and all subsequent parts in the exact same folder.

Select 7-Zip from the menu and click Extract Here or Extract to "Swift_Chubby_Engine" . Swift_Chubby_Engine.7z.001

Right-click specifically on the file ending in .001 . Ensure you have

Download and install the free 7-Zip software (or Keka if you are on a Mac). Ensure you have .001

This file is the first part of a split 7-Zip compressed archive.

If you get an error saying the file cannot be opened as an archive, you are likely missing one of the numbered parts.