I have never used those tools, I usually just dd the iso to a usb. I am assuming you are on a linux distribution already. I would download a fresh iso and verify the checksum. Then use dd to write to the usb. I use this format, and of course replace the path to iso bit and /dev/sdx (your usb)with what is relevant to your situation. Just open terminal and type
sudo dd bs=4M if=path/to/your.iso of=/dev/sdx conv=fsync oflag=direct status=progress
You probably already know but you can find the usb's specific /dev/sdx with sudo fdisk -l