Really sorry to lose you!
There are two methods you can use to cancel your subscription:
If you used PayPal
Log into PayPal, go to MyAccount | Profile. Click on "My Money" then click on "My pre-approved payments". There you should see a list of all your recurring billing payments. Find "scoobysworkshop.com llc" in the list, click on it, then click on "cancel"
If you used a credit card
Note: If you signed up using PayPal and not a credit card, you will get a message below that says you are "You're NOT a paid Member", in this case use the above PayPal method to cancel your membership.