From your account, follow these steps:
Go to the "My modules" tab
Download the module according to the version of PrestaShop that you have installed in your store.

You must take into account the following when you are going to download the module:
PayPal and Card payments are instant payments where you can download the module quickly after purchasing it.
If you use a Bank Transfer payment, it can take up to 4 business days for the payment to be confirmed and therefore you may have to wait to download the module.