Here is small "how-to" about connecting to the OpenShift application.
First, you need a private and a public keys. To generate them you need puttygen
Open puttygen and press generate:
Move your mouse in "Key" area until progress bar is full.
Then type your passphrase and press save private key.
Also, copy all text from Public key section (starts from ssh-rsa)
Now go to OpenShift web interface. Select settings and press "Add a new key..." button.
Insert public key here
Press 'Create'. Now you OpenShift account is ready to recieve connections subscribed with generated private key, but you need to know where to connect.
Go to your application and copy username and host address
Now open putty and past it there:
Go to Connection -> SSH -> Auth and set Private key file for authentication
Now save putty session and connect to OpenShift application.