To update your currency and set it as your default currency login to your Store admin and please do the following:
1. Go to Settings > Geographic Settings > Currency
2. Click on the +Add New button which you'll find this on the upper right corner of your admin screen
3. Fill in your Currency Title, Code, Symbol Left, the number of decimal places (2), Value (please refer to XE Currency Converter for current rates) and set the Status to 'Enabled'. For example:
4. Click Save.
5. Go to Store Settings > Configuration
6. Scroll down to Local > Currency and select (your currency) to make it as the default currency for your store.
7. Scroll down the page and click Save to save the currency settings you made.
Short URL to this FAQ: https://www.salehoo.com/u/G5QyF