Save the song as a template. Then when you hit ctrl N, click the "User Tab" and there will be your beauty. OR READ the manual...
When Studio One starts: Choose the default action to be done upon startup.
• Do Nothing No Song or Project opens by default.
• Open Last Song/Project The most recent Song or Project opens.
****** Open Default Song/Project The default Song or Project opens. To set the
Song or Project to open by default, set up a Song or Project and save it,
with the name “default,” to the Songs or Projects folder located at the
current User Data location set in Options/Locations.