You can use tools like The Unarchiver or the Keka app to extract 7z files.
The file is an archive compressed using the , which is a high-ratio compression standard created by 7-Zip . BLC.7z
Because mod files are community-created, only download BLC.7z from reputable sites like GitHub or Nexus Mods to avoid malware. You can use tools like The Unarchiver or