how can i update my themeforest prestashop theme?

I have bought themeforest theme and author made an update, but i dont know how can i update for fix some issues is presenting my website now, could you help me please?

Sign in to your Themeforest account and click on “Downloads” link from drop-down menu on top-right corner.
Download the theme and that will be the latest theme version.

ah thanks, i need to know what must i do with folder on ftp, i have to replace theme and modules folder with new update folders? i mean modules and theme folders? thanks!

You need to contact theme author for questions related to theme.