UPDATE: Solved. New manual released July 7th. 2019.
PreSonus: Please Keep The Documentation Current!
The documentation that ships with Studio One 4.5.1 is current up until version 4.1, but does not include ANY of the many new features introduced in 4.5.
In fact the documentation is now 6 months old, with no updates.
I work as a software developer myself, and one of the requirements we have before releasing an official version update, is that ALL the new features must be documented.
I find it strange that neither the online docs or the downloadable S1 package or PDF is updated to reflect such major changes in the software.