I apologize for the delay responding to this request. I've been trying to find a way of implementing this in code. If you don't mind loosing the Visual Debugger, there is a way. But I couldn't find a way of closing all IE instances without also closing our own Visual Debugger in the process.
I have logged your feature request here: Public URL. If you want a way of doing this in code (loosing the Visual Debugger in the process) I'd be happy to share it with you.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items