You can change by any Currency to your own country's. There are included multiple currency so, you can select to according to need currency. You have to do the fixed currency from there.
Step-01) Open the Currency Folder
Step-02) Click the New currency for choose your currency mode
Step-03) Add currency name with currency icon
Step-04) Click the Currency list for see all currency with icon which you add in previously
Step-05) Click the Currency fixed for choose and change your currency mood in accounting system