Go to your PayPal account then
Profile -> My Money-> My Preapproved Payments -> Update
Click on Social Knowledge, LLC and go to the bottom and Cancel Subscription.
That being said it's darn good value for the money IMO, $15/year to help pay back and support a great resource like this.
The above post is just my experience/opinion which is worth exactly what you paid for it.
'05 Lance 845/'06 F-250 or '99 Alpine 36SDS Usually towing an '01 Wrangler locked on 35"s or moderate '98 Cherokee on 33"s (rear locker only)