Login to the BACKEND control panel (if you are not already back there) at www.yourchurchsite.com/administrator (where yourchurchsite.com is YOUR actual church domain name ie. www.crossroadschurch.com/administrator).
Go to components>donations>donation management
This page lists all the people who have given and how much.
If you wish to export this data, simply click on the CSV Export link at the top of the page.