public function is_valid_key_format() {
			$license_opt = (string) get_option( $this->get_license_option_key() );
			if ( empty( $license_opt ) ) {
				return false;
			}

			if ( ! preg_match( "/([0-9a-z]+)/i", $license_opt, $matches ) ) {
				return false;
			}

			// Pull the matching string into a variable
			$license = $matches[1];

			if ( 40 !== strlen( $license ) ) {
				return false;
			}

			return true;
		}