Go to the System Settings by clicking at "settings" key on Home page, then choose the "Database" Tab.
Choose the "Update Keyboard Layout:" field, select the ROW number of the keyboard you want to update, there are seven rows on the current layout. After the row number selected, you will see the current keys shown on the screen, then click at the key you want to change. A list of available key will be prompt out for your choice. Click OK after making your choice, then go to "System Info" page to click at "Update" button to save the changes.