I downloaded RadEditor's developer version and followed the licensing instructions however the following message still comes up:
RadEditor4.0.x Copyright © Telerik 2004. To remove this message, please, obtain a 30-day trial key.
The following three solutions will help you to pinpoint and solve the issue:
Make sure your project is properly updated with the developer's dll and files
Follow the procedure below in order to update your RadEditor with the new, developer version:
Delete the .NET Framework cache
Sometimes the .NET Framework wrongly caches the RadEditor.dll and therefore the license message is being displayed. Try the following to ensure that this has been the exact problem and eliminate it: