Once stored in ShelfMenu, the information can be organized using the Organizer window. You can find the organizer window in the main menu, or you can open it using a keyboard shortcut (if configured).
From the organizer, you can rename snippets and folders, move them (the order in the menu will match the order set in the Organizer), and delete them. You can also create new folders by clicking on the "+" button.
When you select a snippet, a preview is shown on the left, and the creation date is also shown.