As explained earlier in this thread all the available downloads are under Products & Subscrptions
menu in your Telerik account
I'd ask you to post any questions regarding UI for WinForms in the corresponding forum
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.