- In the OpenCart Back Office, go to the Extensions > Installer menu and click on Upload.
- Find and select the payment module and click on Open.
- In case you encounter any problem during the installation from your Opencart admin, go to next step. Otherwise, go to step 6.
- Copy the admin, catalog and system subfolders of the upload directory from the PayZen_OpenCart_3.x_v4.0.0.ocmod.zip file.
- Paste it to the root of your installation.
- From the Extensions > Extensions menu, select Payments in the extension type field, find the PayZen module and click on the Install (+) button.