UI Difference between JabRef latest release and current version

Hi. I have just recently started to learn about and thinking about contributing to JabRef and wanted to know if the difference between the latest release and the current version I am seeing is correct. The current version has many controls taken from the toolbar and a longer search centered at the top for example. I was going to show both images but I can just show one. Is this the current unreleased version on GitHub?

Yes, there were large changes in the UI from 4.3.1 to the development version of JabRef 5. What you show is indeed the new look of the dev version.

We are looking forward to your contribution. If you have any questions about the contribution process or the code, feel free to ask here or at github. Please also have a look at our contribution guide.