To TEMPORARILY uninstall Convert PPT to PDF For PowerPoint
1. Open PowerPoint and Goto Tools->Cutomize and under Toolbars tab and uncheck "Convert PPT to PDF For PowerPoint" in the list box.
To PERMANENTLY uninstall Convert PPT to PDF For PowerPoint
1. Activate the Control Panel, double click Add/Remove Programs.
2. Search for Convert PPT to PDF For PowerPoint listbox entry and Remove the program.
3. Goto Tools->Cutomize and under Toolbars tab, Select the item called "Convert PPT to PDF For PowerPoint", then click the "delete" Button in the right side of the dialog.