gravityflow_update_button_text_user_input
Use this filter to change the text of the update button on the user input step..
The follow example will change the button to "Submit".
add_filter( 'gravityflow_update_button_text_user_input', 'sh_gravityflow_update_button_text_user_input', 10, 3 ); function sh_gravityflow_update_button_text_user_input( $text, $form, $step ) { return "Submit"; }
Placement
This code should be placed in the functions.php file of your active theme.