Here is a video on this issue...
Here are instructions for installing the Notion sounds:
1. Please go to my.presonus.com and log in with your email address and password for the account you used to purchase Notion.
2. Once logged in, under "Products" you will see an option for "Notion." Once you click "Notion," you will see the option to download your program as well as the sounds.
3. You will want to download all of the Bundled Sounds Installers for the sounds. If you are on a computer that is not connected to the internet, you can download the sounds installers from your account and transfer them to your offline computer via a USB thumb drive, cd/dvd, or through your network. Simply double-click them to install.
Here is a knowledge base article on installing Notion as well as the sounds...
https://support.presonus.com/hc/en-us/articles/210197703-Notion-or-Progression-Installation