Just install ruby, then run the same commands. I just did that and works on Win7 x64.
Create an ssh key (make sure you don't already have one and will overwrite, for GitHub, etc).
ssh-keygen -t rsa -C "your_email@youremail.com"
Then upload your key to localtunnel (I had to enter my passkey setup in step above)
localtunnel -k c:/Users//.ssh/id_rsa.pub [server port]