Hi,
My PC is running Win10 (1909) and using the 64bit app. Dual monitors.
When running the CHITUBOX app maximized, which is by default, clicking on the Open File or Save File icons will open the file dialog behind the main app window. The only way to get at this file dialog is to press Ctrl-Alt-Del, Cancel, and then the file dialog is on top on the main app window. Also happens when I disable my second monitor. When the app is not maximized, no problem.
Also, have to click the maximize/minimize icon twice to get out of maximized mode. App just flickers on the first click.
I'm a first time user, so no idea if this occurred with prior versions.
HTH
Ken