I would like the option to have the Favorites folder expand upon startup.
Feature requests should be sent to GPSoftware: gpsoft.com.au/Support.html
Feel free to discuss ideas here, or check if there's already a way to do things, but be sure to write to GPSoftware if you want to ensure an idea is noticed and considered by the right people.
Still no way of doing this?
Expand the Favorites item in the tree, then use Settings > Set as Default Lister to save it. (Or close the window, if auto-saving is on.)