You would want to enable PayPal as a checkout option at our end, rather than at 2CO's end, and make sure you are using our Cart buttons (rather than Buy Now buttons for 2CO) to sell your products, so we can show a choice of PayPal and Credit Card checkout options in your cart.
It appears you have entered a PayPal Email in your E-junkie account profile, so you may have inadvertently disabled that as a checkout option for your cart. To re-enable PayPal checkouts, go to Seller Admin > Payment Preferences and checkmark PayPal Payments Standard, then click Submit.