Your default currency is set based on the country you selected when creating and connecting your Stripe account.
If you want to change the currency displayed and charged in your client galleries, click on the Store and then Payment Options. Use the drop-down menu to select your currency:
Note: Auto Fulfillment is only available in USD. If you're currently using Auto Fulfillment, you will not be able to change your currency until you disable Auto Fulfillment in your Galleries. To use any currency other than USD, you will need to create a Custom Fulfillment Catalog.
Stripe payouts will still be converted and deposited in the settlement currency set on your account. Some conversion fees may apply from Stripe. Read more here