WPF Theme Editor does not support the DevExpress WPF Controls 18.2 or later. Use the WPF Theme Designer to customize the WPF Themes. Follow this link to get more information about the WPF Theme Designer.
The Theme Editor is a standalone tool that allows you to modify built-in DevExpress themes and create new themes based on existing ones. This tool aims to decrease development time when editing third party themes - by locating specific visual elements and appearance settings in markup.
Explore the following links for more information on the WPF Theme Editor.
Outlines essential capabilities provided by the Theme Editor.
Shows how to create, edit, save and apply a theme to your application.
Explains how to work with the Theme Editor in a task-based manner.
Describes the appearance and functionality of various user interface elements.