All billing questions

1. How do I update or change our credit card?
2. Where can I find our invoices or get a copy of an invoice?
3. What is the refund policy?
4. Information about adjusting your plan or canceling your account.
5. What is an account owner? How can I change the account owner on my account?
6. How do the free trials work?
7. Is this software reliable, secure, and confidential?
8. What are my options for payment?
9. How do we cancel?
10. How do we upgrade or downgrade?
11. Why can’t I downgrade on the Account screen? I only see upgrade options, not downgrade options.
12. What happens with the free trial if I upgrade from a free account to a paying account?