All downloads are sent via email from Sendowl when you make a purchase, or when an update is released. Installers can not be downloaded from the JST website. Please check your inbox for any download emails from Sendowl and you should be able to access your installers from the download links.
Please note that the download links in some cases might be expired. JST Support can reset the links for customers on request. Submit a support ticket to request this, though please be sure to include your order numbers and/or your email address that you used when purchasing.