You need to sign in and proceed to File and select My Account. In this tab, select the Edit My ooVoo Card. Then type inactive in the Display Name field type and ooVoo to the end of your email address. This serves to remove the real email address from the ooVoo list. You can also use an uninstall tool found at http://complete-uninstall.com/Microsoft.php?&t202kw=Delete%20Oovoo.