Missing +Add In button

I'm a new user in the Excel to Dataiku Quick Start Tutorial. I've downloaded the Excel workbook. I'm on the Flow screen and the picture and screen look exactly the same with one exception - the + Add In blue button in the upper right side of the screen is missing. What do I need to do to have the button added to the screen so that I may add items to the project?

I'm not sure of my Dataiku Edition, so I guessed. If you could provide insight on where to find the edition, I would be happy to look it up.