I have already answered your support ticket on the subject, for convenience I will paste my answer here as well:
Since 2013 Q3 release of or control all FileBrowser dialogs have been redesigned, so, looking at the provided images I can assume one of the following things:
- you are using controls with version earlier than 2013.3.1015. If so - can you try whether you can reproduce the same problem in our online demos which are running with the latest version of the controls?
- you are using RadEditor with enabled external dialogs and the files for the dialogs are taken from a version earlier than 2013.3.1015. If this is the case, you will need to update the dialog files to match the controls version used in your application.
Please, give the suggestions above a try and let me know how it goes.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.