In the Window menu on the LabVIEW toolbar there is an "All Windows" [last] choice (CTRL+SHIFT+W) that pops up a dialogue which you can sort.
There is also a VI hierarchy and Class hierarchy graphical representation of VI's that are in memory that are accessible from the "View" menu in the toolbar. That may be easier for you if you are familiar with the hierarchies and the project is not too large (also highlights the importance of VI icons).