Demo registration is generally no-charge unless separately agreed in writing. Single-use purchases are generally non-refundable once access, evaluation, or report delivery has occurred, except for duplicate charge, billing error, required law, or written agreement. Monthly plans may be canceled before renewal; access continues through the paid term; no prorated refunds are generally provided except for billing error, required law, or written agreement. Annual plans may cancel renewal; refunds are provided only by written agreement, billing error, or required law. Enterprise and other manual-billing arrangements follow the applicable written order, quote, or contract.