I did the upgrade and it fixed the one problem, but a new one popped up that much worse. Now, when someone attempts to buy anything, when they hit the paypal button they get:
Fatal error: Call to a member function getUserInfo() on a non-object in /home/[MY SITE INFO]/wp-content/plugins/wp-cart-for-digital-products/eStore_payment_submission.php on line 362
HELP? Please? ASAP?