As you already could read through earlier, in Doors \AQUA there was a division of system into separate components. Given a component (aeda.sys) is responsible for the graphic interface (GUI). The design of windows as a whole has remained same as well as was earlier. The given kind of windows very much has liked much and consequently has been decided to not change appearance. In a view of addition AQUA buttons have changed only:) them became three also they became color.
More detailed information will be a little bit later.