You may have noticed that there is a single project name at the top of the RECENT section of the Library pane. But it doesn’t seem to ever list the most recent project you were working on. Well, almost never.
The trick is it only registers the last project double-clicked from the Projects view in the browser. Click the Projects icon in the Library pane to show all your projects in the browser window. Double-click a project in this view to update the RECENT list. If you select a project from the Library pane and start working on it, it will not update in the RECENT list.