Alright, let's get this old PowerPoint add-in Uninstalled.
Select File from the top menu in PowerPoint.
Go to the bottom left of the File window and click Options.
Select Add-Ins from the options on the right.
Click the Manage drop-down menu at the bottom of the window and select PowerPoint Add-ins. Then, click the Go... button.
Finally, with PresenterMedia selected on the left, click Remove from on the right side of the window.
There you go, the old discontinued add-in is removed. Have you installed the new PresenterMedia PowerPoint Add-in?
If not, click here to get the PowerPoint Add-in.