A family of Microsoft word processing software products for creating web, email, and print documents.
The file will have a .PPAM ending. Unfortunately, while you can find the path to an add-in in Word, PowerPoint is not helpful. You could either:
- look in ~/Library/Group Containers/UBF8T346G9.Office/User Content/Add-ins, or
- do a Spotlight search for .ppam and/or linkcreation and/or link.