Connect OpenCart store to AfterShip

Download the new extension from here.
Ensure the downloaded extension filename is ending with .ocmod.zip.
Login to your OpenCart store as an admin user.
Ensure you have FTP enabled on your server. Refer here on how to enable FTP on your server.
Ensure the FTP user has the correct permissions to read/write the OpenCart directories.
For proper FTP usage, it is recommended to install QuickFix.
Go to Extensions > Extension Installer.
Click Upload > select the .ocmod.zip extension you had downloaded earlier > Click Continue.
Go to Extensions > Modifications. Click on the Refresh button.
Go to Extensions > Modules > AfterShip Track Shipment v2.0 and click Edit
Enter your AfterShip username, api_key and change the status to Enabled. Click on the Refresh button.
Verify that module is Enabled and the Courier List from AfterShip has been updated in OpenCart.