Click subscriptions. Scroll down to geeklists.
Or manage subscriptions and click geeklists.
In case you don't know where subscriptions are, they're just to the right of the BGG logo (which is in the top left). At the top there's Geekmail (with an envelope icon) and then underneath there's what looks like a folded newspaper, which is subscriptions. If there's a number next to it greater than zero just click on it.
To see what things you've subscribed to, you'll find manage subscriptions on a drop down menu if you hover over My Geek, which is just to the right of your user name.