There’s only one php file in the pack.
I downloaded plugin pack from here, unpack it and uploaded ‘wpml-widgets.php’ file into plugin directory in my WordPress folder, which is:
/wp-content/plugins/wpml-widgets
To be sure that nothing wrong happened just rename the old file before you upload new one which is correct. I had to drop the browser cache to see the effect. If everything’s OK just delete the old one and it’s done ??
Greetings!