Default, I believe. PP has never asked that. The closest I've ever seen is the Import Workspace from Projects option.
Having said that, there is a new Sync feature which will allow you to store your settings in the cloud and import them to any copy of PP you happen to be working on. I like this, as I often have to edit on my producer's laptop, and he doesn't have the same settings I do.
Yes i am really looking forward to syncing settings between my work pc and home pc.