If you are looking for context or guides on how this version functioned: Dialnet Article: A technical look at Wifislax 3.1 for auditing and securing WiFi Official Blog: Wifislax Blog

Once the download is complete, you will need to create a bootable USB drive or burn the ISO to a DVD/CD. Tools like Rufus (for Windows) or Etcher (for Windows, macOS, and Linux) can help you create a bootable USB drive easily.

Wifislax 3.1 was released before UEFI became universal. Solution: Enable in your BIOS or use a tool like isohybrid to convert the ISO.