I am no longer able to choose a member or node in the table to select it in the graphic? Is there any setting to be adjusted?
Probably, the buttons [Selection Synchronization] and [Display Selected Objects] have been deactivated in the tables window. Turn them on again (see picture 1). Then, when you select an object whose table row is marked, it will be highlighted with colors in the graphic. The same applies vice versa: When you select an object in the graphic, the corresponding row will be displayed and highlighted in the table, too.
Objects that are clicked in the Data navigator are selected in the graphic as well (see picture 2).