 currency update Result: All new invoice calculations use the latest rates; existing unpaid invoices use rates in effect when payment was made. Scenario: You only want to offer invoicing in USD and EUR to simplify operations. Setup: Configure only two currencies: USD (1.0) and EUR (1.1) Delete any other unnecessary currencies Payment forms only show these two options Client currencies default to these two options Result: Simpler currency management with fewer exchange rate updates and less customer confusion.