Custom PayPal Image Logo for PayPal Express

In module.paypalexpress.php (around line 316)

Find

'VERSION'        => '53.0',

Replace

'VERSION' => '63.0',
'LOGOIMG' => 'https://www.domain/your-logo.png',

Reference:

• https://developer.paypal.com/docs/classic/api/merchant/SetExpressCheckout-API-Operation-NVP/
• https://developer.paypal.com/docs/classic/express-checkout/integration-guide/ECCustomizing/#include-your-company-logo