Connect your website to your fastw3b.com account, using the Connect button in the FW Real Estate admin header. The add-ons your subscription covers are then downloaded and enabled on their own, and the free ones come with connecting by itself.
If the add-on you want is not among them, it needs a subscription that covers it. Take out or extend one on fastw3b.com and it will arrive automatically on a later visit to the admin, with nothing to download or install by hand.
Everything the site has received is listed under Admin, FW Real Estate, Add-ons, where you can enable, disable and update each one. Add-ons cannot be deleted: an add-on you do not want is simply left disabled.