Hi Shelly,
Please download the premium plugin from here: https://getwooplugins.com/my-account/downloads/
And install the plugin on your dashboard.
If you need further assistance, please let us know.
BTW, here is the link to our documentation.
Thank You
How to activate “Go Pro” version of this plugin
Shelly Chan
I have purchased business license for the plugin “Additional Variation Images Gallery for WooCommerce” at $149 and I have already paid. However, my wordpress plugin version is still not upgraded. please advise how to get the upgrade. thanks