Coloring/association of UI widgets hard to grasp
Since there are many DBMS states (active/selected/hovered) and additional widgets such as the top active one as well as the details it is sometimes hard to keep the picture.
For instance the selected DBMS is marked with a blue line but has no association with its related details. Blue, in addition, is also used for the Open button. See my attached picture.
I suggest to use consistent coloring. A simple and quick proposal is attached.