If you use Windows XP or bellow you can go to Start > Control Panel > Add or Remove Programs. In the Currently installed programs box, click on the iVIDI Plugin and then click Remove.
If you have Windows Vista or above you need to go to Start > Control Panel > Programs > Programs and Features. Select the iVIDI Plugin and click on Uninstall.
Also, another solution can be Revo Uninstaller which will force the application to uninstall by wiping out all traces of its presence from the system.
