Yes, you can! Follow these instructions to do so:
Tap into the Monthbook or Monthly Mini with the prints you’d like to reorder
Tap on the “Prints” tile
Tap “Buy again”
If you have an available prints credit available it will apply that to this order, if not, you can choose to "Continue to purchase" or "Wait for my next credit"
If you continue to purchase, select the address you’d like the prints sent to and tap “Continue”
Tap “Send to Print”