Uninstalling the AJAX Control Toolkit - DevExpress/AjaxControlToolkit GitHub Wiki
To remove the Toolkit extension from a particular Visual Studio run Visual Studio and open the Extensions and Updates dialog box:
images/ExtensionsAndUpdates_1.jpg
Then, select the ASP.NET AJAX Control Toolkit and click Uninstall:
images/ExtensionsAndUpdates_2.jpg
To remove the Toolkit from all Visual Studio versions you can run the Installer again:
