You can manage rates of currencies in following manner:
1. Go to Dashboard.
2. From the top Navigation drop down, select Store whose currency rates need to be changed.
3. Press Currency Rates button on top navigation.
4. Add the updated conversion rates for each currency and press Save Rates.
Once the Stores are created, all currencies and their rates added in your store will be automatically synced to Wizzy from your Magento stores.
Currency rates are automatically managed for Magento 2 stores. No configuration required from this page.