Hi Ian and Stu,
Could you first check the settings of your PayPal Checkout payment method? Make sure the credit card settings are properly set up (the "Enable credit cards" setting in particular), and save the payment method once, even if you don't change anything. That way, all its settings are stored with the options of the current version.
Also, were you using the old "PayPal" payment method before the update rather than "PayPal Checkout"? They don't display the payment the same way, so the interface can differ when switching from one to the other.
If it still doesn't look like before, please post a screenshot of the settings of the payment method and of the payment page, so that we can see what is displayed.