If you need to change the currency settings on an existing wedding, you have two options. First, you can view the weddings on your planner dashboard and click EDIT SETTINGS under the relevant wedding. Second, from within the wedding you can click SETTINGS on the top right of the tool bar. Either option will bring you to the same WEDDING DETAILS menu where you can scroll down to PREFERENCES and choose your currency for that wedding. Updating your currency here will not affect other weddings.
While this will change the currency symbol for a specific wedding, if you need to update the currency default for your account, return to your planner dashboard and click BUSINESS INFO, then choose your default currency from the drop down menu. This will set the currency preference for all new weddings that you create moving forward.