What version of Premiere Elements and on what computer operating system is your Premiere Elements running on?
Also, what do you want to do
1. Transfer an Elements Organizer Slideshow Editor slideshow to Premiere Elements Editor
(This gets complicated in 13)
2. Just switch from Elements Organizer workspace to Premiere Elements Editor workspace?
(There are buttons on each side for such a switch)
With the above information, we can focus in on the details that you need.