To view payments made between you and your clients, you are required to do the following:
Click on the Payments feature of the Transactions module in the Navigation panel;
You should now see a list of your payments organised by date and time in descending order (most recent at the top down to older payments at the bottom);
You can then click on an individual payment to see a 'Payment Summary' which displays key information for that payment.
Within the 'Payment Summary' screen, if the payment is 'Unprocessed' or 'Processed', you can download the CSV or ABA file by navigating to the drop down menu in the right hand corner.