When you start the uninstall wizard, the window shown bellow will appear. The list contains all the applications which you can fully uninstall using the installation monitor - that is all the installed applications for which you made an installation log.
Please choose an application from the list and press the Next button to uninstall the application. After pressing the Next button, the wizard will go to the uninstall options step in which you can choose the uninstall options.
After selecting an application from the list you can also press the Delete installation log button to delete an installation log. If you delete an installation log for an application, you lose the possibility of uninstalling that application using the installation monitor, and you will have to uninstall it using the application's own uninstaller (if the application has one, and if it works).
See also:
How to monitor an application in order to create an install log
The uninstall options step of the uninstall wizard
The other steps of the uninstall wizard