How can I change the duration of my offer ?

If you're already using the Premium offer, you can take advantage of a preferential rate and save up to 15% by opting for a 3 or 12-month subscription.

To do so, go to the website from your computer,
Click on "My Account",
Then "My subscription",
In the box for your Premium offer, you can change the renewal period by clicking next to "1 month",
Then choose "3 months" or "12 months".
And confirm by clicking "Update renewal period".

Note that your new subscription will take effect at the end of the current period.
You will then be billed for the new period at the next renewal due date.

Here's an tutorial video :