I don't understand what it does beyond what is available from the File menu. I save a new file name iteration every once in a while (incrementing an appended numeral), and the Start Screen is just as populated by various old versions as the recent files list - if I pin a version, then the new iteration is un-pinned, making a bother. I start new unnamed projects with Ctrl-N, start new named projects from the File menu, start existing projects from Windows Explorer.
Now I'm thinking about what I would like to see when I start Sonar "bare".
One cool thing would be an instantly available recording mode. Ideally it automatically would be set to record any inputs (and outputs) which have any level, so that if I want to record something I'm playing or listening to I can do so easily.
It would be cool to see a skeleton of Preferences - plugin managment, audio settings, updates available, elements from the File menu (without the start screen's pictures). "Quick tips" are OK. Everything would have to show up immediately, though, as the only reason to have it display automatically on start is to save time / attention.
I'd like to see basic audio settings (like the Record bit depth, which always seems to be getting reset to 16) prominently displayed on startup. That kind of thing used to show up in a status bar.
It's not necessarily part of the Start Screen, but to help when starting new projects, it would be great to see a rebuilt template creator since it's kind of unwieldy the way it's operated under the "save as" dialog now.