You only need to download the zip file once. After you have installed the plugin, it will be added permanently to your WP interface. Please note that for each sub-widget (unique website) you will need to add your unique installation code.
Log into the ResponseiQ dashboard. Go to Settings > Installation > Wordpress Plugin and download the zip file.
Log into your WP account, go to Plugins > Browse and upload the ZIP file, then click Install Now.
Go to Settings > ResponseiQ, copy and paste your code into the box and hit save.
Access your website and check the code is live. If you need help, get in touch with us at firstname.lastname@example.org.