Performed a full file check and everything looks good. I'm at a loss as to what to try next. I don't want to go down the "delete all your INI files" path as I am concerned that I would lose all of the key assignments and UI setup which took a lot of time to setup.
Can you click the big X in upper right? Or close thru task manager? This sounds like the same problem many others have posted and they don't have a fix yet. https://forums.daybreakgames.com/eq...g-when-logging-out.260279/page-2#post-3838614
Thank you CatsPaws. The classic EQ login screen appeared after the black screen. Selecting Quit did nothing. Selecting EQ login screen title bar close (X) as you suggested closed the window.