One of your accounts should be in another currency
If you're using MYOB AccountEdge's multicurrency feature and you notice that an account is displayed in the wrong currency, open the Details view of the Edit Accounts window and change the currency there. If you choose a foreign currency, you'll be asked if you'd like MYOB AccountEdge to automatically create (or update) an exchange account for the account you're changing. We recommend that you choose to create or update the account.
If you've already entered transactions using the account, you'll have to delete all the transactions before changing the account's currency. Be sure to reenter the transactions you deleted.