OK, thanks for your answer.
But what about transfering orders? I tried exporting orders via WordPress Export under Tools, but I don’t have all the order details when I do that. I tried some other plugins but it messed up my WooCommerce functionality so I had to delete it and it install it again.
Can you give me some advice on that topic? What would be the best way to export orders from old site and import them to new site but keep details of the order.