Insert file maximized, unable to Restore

[Alan]

I have Windows 10, Atlantis 4.3.3.0, and run Atlantis maximized on a portrait/vertical screen.
While doing an Insert file this week by clicking the icon on my toolbar I was moving the Open Document pane to position it to make it easier for me to read. In the midst of that it was maximized (1/8" margin on left and right sides, Title bar at top, bottom about 1/4" below the bottom of the screen). I assume that Windows 10 did this based on how I was moving the pane.
The Restore and Size functions from right clicking on the Title bar do not work and the pane cannot be moved by dragging the Title bar. How can I restore the behavior that I had since installing this version and in past versions the years I have been doing Insert file?

Alan

[admin]

Try double-clicking the title bar of the “Open document” dialog. Check if you can grab the bottom right corner of the dialog. If you cannot, double-click the title bar again.

If this did not work, close Atlantis, open the “My documents\Atlantis\Atlantis.ini” file with a plain text editor, and remove the line beginning with “OpenDlgSize”.

[Alan]

Thanks admin.
After double clicking the Title bar the lower right corner could be grabbed (double-headed arrow appeared as it had without double clicking) but the corner would not move/change size. A second double clicking resulted in the same behavior. Then right clicked Title bar and clicked Restore with no change. Then double clicked and Open Document pane changed size and became moveable & sizeable. It is now back to the way it was for me. Somehow double clicking seems to be the key.

Alan