Below are the two ways to Navigate & open an existing Slide Deck:
From EduSlides Tab:
Click on the "EduSlides" tab on the left side menu
The slide deck page is displayed.
You may open an existing slide deck, from the list of Past Outputs shown on the right hand side, by clicking on the slide preview.
From Resources Tab:
Click on the "Resources" tab on the left side menu
The resources page is displayed with a list of resources
Click on the Slide Deck Resource you want to open or
search for a Slide Deck in the search box & click on it to open
The Slide Deck is opened