Change Language Vendor Store

Hi,
i want to translate the vendor store page in Italian language.

I tried to translate it with ” Loco Translate ” plug in but it doesnt work.
I follow the this guide https://wc-marketplace.com/knowledgebase/wcmp-translation-guide/ but no way.

So i decide to edit the field on ” class-wcmp-vendor-hooks.php ” but i want to know if i will update the plugin i will lost the customize.

There is a way to copy this field into child theme ? if not, how i can change language without lost it ?

Thank you !