This version introduces new dark themes for the Atlantis GUI. Four new background colors are available in the toolbar customization dialog ("Tools | Customize | Toolbars..." menu command):

Choosing any of these four background colors activates the corresponding Dark Theme of the Atlantis GUI for the toolbars, the Document Bar, the Control Board, and the status bar:

These new background colors can be combined with the colors available for the document window on the "Colors" tab of the "Tools | Options…" dialog:

In this way, you can mix colors to create your own Color Theme for the Atlantis window:

See more release notes.