Edit Invitation Fields

Hi,

I’m trying to change the ‘Invitation Code’ label to ‘Serial Code’ in the rpr-signup.php file, also I’m trying to change the invitation_code_msg (both) to say serial code instead of invitation code.

I’ve changed…

if ( '1' === $register_plus_redux->rpr_get_option( 'enable_invitation_code' ) ) {
				$invitation_code = isset( $_REQUEST['invitation_code'] ) ? (string) $_REQUEST['invitation_code'] : '';
				echo "\n", '<label id="invitation_code-label" for="invitation_code">';
				if ( '1' === $register_plus_redux->rpr_get_option( 'required_fields_asterisk' ) && '1' === $register_plus_redux->rpr_get_option( 'require_invitation_code' ) ) echo '*';
				echo __( 'UK Serial Code', 'register-plus-redux' ), ':</label>';
				if ( $errmsg = $errors->get_error_message('invitation_code') ) {
					echo '<p class="error">', $errmsg, '</p>';
				}
				echo "\n", '<input type="text" name="invitation_code" id="invitation_code" value="', esc_attr( $invitation_code ), '" />';
				if ( '1' === $register_plus_redux->rpr_get_option( 'require_invitation_code' ) )
					echo "\n", '<p id="invitation_code_msg" style="display: inline;">', __( 'This website is currently closed to public registrations. You will need a UK serial code to register.', 'register-plus-redux' ), '</p>';
				else
					echo "\n", '<p id="invitation_code_msg" style="display: inline;">', __( 'Have a serial code? Enter it here. (This is not required)', 'register-plus-redux' ), '</p>';

Can anyone guide/advise me as to why it isn’t changing on the register form?

https://wordpress.org/plugins/register-plus-redux/