Our modules have been throughly tested on the versions indicated on each module's information page.
For example, a module indicating versions 1.2 - 1.7 is tested on various intermediary versions of each major branch: 1.2, 1.3, 1.4, 1.5, 1.6 and 1.7. They are guaranteed to work on any standard PrestaShop installation.
All our modules come with a standard free upgrades period of 3 months. You can however purchase an extension period to 1 year or 2 years with each addon when adding it to your cart.
At Business Tech, upgrades are regular in order to continually assure you reliable modules.