Updating the payment module
If your shop already has the PayZen payment module, it must be uninstalled.
WARNING: Make sure you save the parameters of your module before you delete it and, most importantly, save the production certificate that is no longer visible in your Merchant Back Office.
The payment module is uninstalled via the back office: modules > payment of the osCommerce solution.
- Click on PayZen
- Click on Delete this module
- Install the payment module following the steps in the next chapter.