When you created you agent contract terms you selected you price catalogue and currency for you agent contract. If you need to change the price catalogue on the contract or change the currency you can do that in Booking Agent Contract Terms
Select "Contracts" from the top bar, then select "Booking Agent Terms" from the drop down list.
Select the contract terms you need to update from the list of available terms.
Select the new price catalogue and/or currency and save. Note that this will update every Booking Agent that is linked to these terms instantly.
you can see by selecting the "Booking agent terms" tab which agents are connected to this contract term.