Afterpay has released a new module for PrestaShop versions 1.6 and 1.7. To upgrade to the new module, follow these instructions:

Upgrading the Afterpay module for PrestaShop 1.6

1. In the PrestaShop admin area, select Modules and Services.
2. Type Afterpay in the module search box.
3. Find "Afterpay Payment Gateway" by "Afterpay Touch Group" and click the dropdown button next to Configure.
4. Click Delete.
5. Find "Afterpay Payment Gateway" by "Afterpay" in the module search results.
6. Click Install. A configuration page will appear.
7. Enter your Afterpay region ID, merchant ID, secret key, and API environment.
8. Enable the module and express checkout using the toggles.
9. Click Save in the lower-right.

Upgrading the Afterpay module for PrestaShop 1.7

1. In the PrestaShop admin area, select Modules, then Module Manager.
2. Type Afterpay in the module search box.
3. Find "Afterpay Payment Gateway" by "Afterpay Touch Group" and click the dropdown button next to Configure.
4. Click Uninstall.
5. Select Modules, then Module Catalog.
6. Type "Afterpay" in the module search box.
7. Find the "Afterpay - Buy now, Pay later, Always interest-free" module and click Install.
8. Select Configure and enter your Afterpay region ID, merchant ID, secret key, and API environment.
9. Enable the module and express checkout using the toggles.
10. Click Save in the lower-right.