Soli3.7z -

Are you getting a specific when you try to open it?

: The best choice is the official 7-Zip (free and open-source) or WinRAR. macOS : Use The Unarchiver or Keka . SoLi3.7z

: This creates a new folder named "SoLi3" first (recommended for keeping things organized). Are you getting a specific when you try to open it