Yes, you can open the actual invoice and unapply the payment from there, Golden_Bee.

To give you the detailed steps, once you're on the invoice, click the Payment hyperlink to open.

Next, uncheck the box to unapply the payment. After that,  click Save & Close to apply the changes.

By following the steps, you'll successfully unapply the payment. If needed, you can later reapply it to other invoices or handle it as a credit. Please let me know  if you need further assistance or if you have any questions or clarifications when unapplying a payment. We're always around to assist you.