Once you have purchased this add-on, we will install the ability for you to be able to use this tool. After we have gone ahead and done so, you may activate this based on membership plan. 

To add this as a feature for a membership level, simply navigate to Finance >> Membership Plans:

Click on "Edit Settings" for the membership level you would like to activate it for.

Then go to the "Profile Page" tab:

And scroll down until you see the Member Review Settings section:

In this section you can activate the option for members to reply to reviews as well the option to upload images with the review:

If you have any other questions, please submit a new ticket here.