Comment 4 for bug 1292854

Since nothing happens for now, it seams that the easiest way (at least for Debian based distros) is to download the .deb package directly from authors site https://launchpad.net/~realender/+archive/ubuntu/winconn/+packages and install it through dpkg -i

The PPA is still missing:

W: Failed to fetch http://ppa.launchpad.net/realender/winconn/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/realender/winconn/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

Milan