This question was posted in response to the following article: http://help.adobe.com/en_US/premiereelements/using/WS5D044C3B-1939-4c8e-BC5A-97D122D4D73F. html
Does Premiere Elements 11 have a clear projects options? for example I create a movie I have rendered sections several times and saved my movie burned a DVD now i want to clean my hard Drive of every thing that Pre E 11 has created except my source data, what method do i use to do this?
In my books I always recommend creating a new folder for your project file whenever you start a new project. This makes clearing off the project, and all of its auto-saves and render files, as easy as deleting this folder.
Otherwise, there is no easy automatic way to do it. You just have to chase down the supporting files manually and delete them.