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.
The part with the VBA will most likely be in C:\Users\YourActualUserName\AppData\Roaming\Microsoft\Addins. AppData is normally a hidden folder. A simple way to open it is to type %appdata% in to the address bar of a file window.
In the Addins folder In that folder will be a file that ends with .ppam. To do a quick test, shut down PowerPoint and move that add-in out of it's folder. When you restart PowerPoint, it may complain that an add-in file is missing, but what you're watching for is whether that VBA error message appears. If not you've found the culprit.
Perhaps there's an update from Camtasia that solves the issue.