If you have installed the demos locally, the class can be found in <Demos folder>\App_Code\Editor
. For your convenience I attached it to this thread.
The online documentation is available here
. There was a problem with it that prevented the FileExplorer API to be included in the reference, but now the problem is fixed and the updated online help should be available later today or on Monday. We are also planning to enrich and improve RadFileExplorer documentation - this will happen in the next couple of weeks and will be updated online every week. Of course with the next service pack all that content will be available in the offline help as well.
the Telerik team
, the state of the art learning tool for Telerik products.