A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hi Jeremie,
Thank you for posting in our forum. We assume that you are using Office 365. Can you confirm it? If yes, downgrading is not possible. You can follow John's suggestion to get a copy of Office 2016 from a retailer.
Let us know if you need any further information.
Regards,
Justin