navigate_nextWhy was I charged a prorated amount when upgrading from the Community Edition plan to a monthly subscription? navigate_nextWhy do I see a $0.01 - $1 charge after adding my payment method? navigate_nextHow do I update my payment method or billing information? navigate_nextI have a subscription through the iOS app, how do I get a refund? navigate_nextWhere can I find my receipt/invoice? navigate_nextWhat is your refund policy?