You can access your OpenVPN Credentials on this page: https://windscribe.com/myaccount#configgenerator-openvpn 

You must be logged into your account and be on a paid (Pro or Custom) plan to access this feature via the Config Generator section of your My Account page

You can then select the options for your config in the following steps

1. Select your Location/IP of choice from the dropdown
2. Select your Protocol (UDP or TCP)
3. Select your Port (6 options, default is 443)
4. Press the Download Config button to save the config to your device
5. Lastly, generate your credentials for the connection authentication using the Get Credentials button