If you are a paid user, you can cancel your Netvibes VIP subscription at any time
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Click on 'Dashboards' on the right top of your private dashboard
Select 'Manage…'
Click on 'Netvibes VIP'
Click on 'Unsubscribe' at the bottom of the page
Confirm your choice
Once cancelled, the automatic renewal of your VIP subscription will be disabled. Your Netvibes account will be downgraded to Basic at the end of the paid year. If you change your mind before then, you can easily reactivate your subscription by simply going to the Netvibes Premium page: http://www.netvibes.com/account/vip