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Try to enter the functions.php file of the theme and look for the excerpt where it has this type name:

'name' => _x('Produtos', 'post type general name'),

or

'singular_name' => _x('produtos', 'post type singular name'),

And change the name, but only where it has name, otherwise you compromise the operation, because in those 2 items are just label. I do not move with themes ready but if it is easier, give a ctrl + F to search the name 8Theme Options and see if it is within 'name'. But please backup!