The easiest way to retrieve files is from the Crashplan application.
Launch the Crashplan application (select "Show Crashplan" from the house icon at the top of your screen or find Crashplan in the Applications folder), then click the "Restore" tab.
Navigate to the file or folder you want or use the search dialog.. Check the box next to the file or folder to retrieve once it is located.
By default the most recent version is restored to the Desktop. There are options to restore previous versions to a different location by selecting the links.