Change Project slug and name [solution]

For anyone who needs:

/*Translation for Projects*/
// change singular name. Change "Your Proyect Name" to something
add_filter( 'projects_post_type_singular_name', 'replace_project_with_new');
add_filter( 'projects_post_type_plural_name', 'replace_project_with_new');
function replace_project_with_new( $project ){ $replaced = str_ireplace('Project', 'Your Proyect Name', $project); return $replaced; }

/* rewrite slug projects*/
//changes slug for single project page. Change "your-slug" to the desired slug

flush_rewrite_rules(); 

function change_slug_of_post_type_portfolio() {
    $args = get_post_type_object("project");
	$args->rewrite["slug"] = "your-slug";
	register_post_type($args->name, $args);
}
add_action('init', 'change_slug_of_post_type_portfolio', 20);

Tested in Projects Version: 1.5.0

https://wordpress.org/plugins/projects-by-woothemes/