V1.5.0

I would like my customers to know they can use a credit card on PayPal, so I want to change from plain PayPal logo to the PayPal logo with the credit card images.

I know how to change an image, I just can't find where it is in my site files.

Current Logo:
Click image for larger version.  Name: Checkout.jpg  Views: 330  Size: 51.0 KB  ID: 13179

I want to change it to this one from the PayPal site:
Click image for larger version.  Name: CheckoutNew.png  Views: 2283  Size: 32.4 KB  ID: 13180

Thank you.