The Files Are Opened in Split Panels When I Restart the Oxygen XML Author Application

When I close the Oxygen XML Author application with multiple files open and then restart it, every file opens in a split panel of the editing area instead of a tab sharing with the other opened files the same editing area which organizes the editors in a tabbed pane. I want to have the files arranged as a tabbed pane as they used to be arranged before closing the Oxygen XML Author application.

This happens sometimes when several files are opened automatically on startup. It is a problem of the JIDE docking views library used in Oxygen XML Author for docking and floating views. The workaround is to run the action Window > Reset Layout. If you have a specific layout of the Oxygen XML Author views which you want to preserve when running this action you should set your layout with the option Use fixed layout that is available from menu Options > Preferences > Perspectives Layout.