Thank you for this question.
The Telerik theme is an old theme created before we presented our new theming mechanism and the new Visual Style Builder tool. Currently we do not have resources to update this theme and we have not scheduled such task. Please, could you tell us how critical is this theme for your application and which controls are you using? Your feedback will help us to schedule our tasks better and if more people request the same we will raise the priority for the task.
Should you have any further questions, do not hesitate to contact me.
the Telerik team
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