CoPilot is not a free application which means that you will have to actually purchase it. Luckily, the software is still available for purchasing from the official website of the developers. Visit their page and then add the product that you need to the cart and finalize the procedure.
While on the page, make sure to choose the correct version for your needs because there are two: one for regular cars and one for trucks, because while the roads might be the same, the rules are actually different.