To cancel auto-renewal for your RoboForm Everywhere license:
1) Navigate to https://www.roboform.com/php/pums/customer_info.php?licenses
2) Submit your Name+OrderID or Name+Email
3) Click "Manage the subscription." There will be a link which turns the auto-renewal OFF.
You may also cancel from within your PayPal account interface:
For old PayPal interface: PayPal -> "Profile" page -> "My Money" -> "My Preapproved Payments".
For new PayPal interface: PayPal -> "Gear" (settings) button -> "My Preapproved Payments".
Select to cancel the recurring payments profile there.