Lightroom 5 CC just upgraded itself unexpectedly since then the since then the startup menu where you chose the catalogue is not appearing

Since Lightroom 5 upgraded unexpectedly today the start-up menu where you choose which catalogue to load is not appearing at start-up and Lightroom is loading into the last catalogue used, I have a number of catalogues so I need to be able to find them quickly the start-up menu did that.  How do I get that back?