Ribbon tab exists even after uninstalling PowerPoint Add-in

Question

I have created an application level Add-in for PowerPoint 2010/2013 using C# VSTO. The add-in is installed from msi installer file.

The problem is that after I uninstall the add-in from the control panel and open a new PowerPoint presentation, the ribbon tab is still visible with all the functionalities correctly working.

To remove the tab I have to do either of the following two things:

1. Remove the add-in from the COM Add-ins list from the PowerPoint Developer tab.
2. End the running instance of PowerPoint from Task Manager.

I have called the dispose methods(in ThisAddIn_Shutdown method) for all the initializations I have done in ThisAddIn_StartUp method but this is not helping.

private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
    {
        this.Application.WindowSelectionChange -= Application_WindowSelectionChange;
        this.Application.SlideSelectionChanged -= Application_SlideSelectionChanged;
        this.Application.SlideShowBegin -= Application_SlideShowBegin;
        this.Application.SlideShowEnd -= Application_SlideShowEnd;          
    }

Am I missing something?

Anyhelp is most welcome. Thanks!

Answer 1

Finally was able to find out the cause. It was due to a few lines of custom code written in the InitializeComponent() method in the Ribbon.Designer.cs file.

Got rid of the problem when removed that piece of code.