Theme Designer - The preview window is corrupted when the custom theme name is Office2019Colorful
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
It's not correct to use our theme names in custom themes, as these themes will conflict. We added validation to the Theme Name field to warn our customers about possible issues.
Theme Designer v19.2.1 is already available for download at https://github.com/DevExpress/wpf-themedesigner-app/releases. If you already have Theme Designer installed, it will suggest upgrading if you restart it.