windows - Can't install WinUSB on Ubuntu 15.10

I recently installed Ubuntu 15.10 on my old computer. I'm now trying to create a windows usb stick to install on a new computer I'm building. When I add the repository

    sudo add-apt-repository ppa:colingille/freshlight

and I try to update, I get the following errors:

    W: Failed to fetch http://ppa.launchpad.net/colingille/freshlight/ubuntu/dists/wily/main/binary-amd64/Packages  404  Not Found
    W: Failed to fetch http://ppa.launchpad.net/colingille/freshlight/ubuntu/dists/wily/main/binary-i386/Packages  404  Not Found
    E: Some index files failed to download. They have been ignored, or old ones used instead.

Then when I try:

   sudo apt-get install winusb

I get:

   E: Unable to locate package winusb

Can anyone help me find a solution?