Before you can change your settings, you need to Signup or Login first.
When you change the currency, it only affects the displayed numbers for this client/browser. It won't make any currency conversions.
You can import a JSON file exported from Budget Zen (v1 or v2) before. Learn more about the file format.
When you change your email or password, you'll need to login in other devices again.
Change Password / Encryption Key
You can delete your account and cancel your subscription from the billing section.