Do I need to add some extra code for last veronika when using pay plugin?, or code already integrated for premium + highlight options?

Code is allready there.

In loop-single and loop-single-premium

  <div class="simple-prod o<?php echo $c; ?><?php if(osc_item_is_premium()) { ?> is-premium<?php } ?><?php if($class <> '') { echo ' ' . $class; } ?> <?php osc_run_hook("highlight_class"); ?>">