You can update your Paypal funding source at any time following these instructions:
Log in to PayPal
Go to 'Wallet' and ensure your preferred payment is listed under 'Payment Methods'. If not, please add it.
Click on the settings icon
Click on 'Payments'
Click on the 'Manage pre-approved payments' button
Click the MediaZilla hyperlink.
Under 'Funding Source', then 'backup funding source', click 'change' and select your preferred payment.
Additionally, you can add another PayPal account as a payment method in the "Payment Method" section of your Company Settings, accessible from the company drop-down in the upper-left corner of your dashboard.