There is no longer any license for OXD now. If you still wanna OXD 2.0 then you can get it from here https://gluu.org/docs/oxd/2.4.4/install/
We would like to suggest you to use our latest OXD 4.0 which is in still development. We made some major changes in it. It is easy to use and other some features. https://gluu.org/docs/oxd/4.0/release-notes/
You can install it for now by following manual installation https://gluu.org/docs/oxd/4.0/install/#manual-installation.
Let us know, if you face any other problem