Slider Revolution for Magento was developed in partnership with Themepunch, author of original SR for WordPress. And all premium content ( addons and templates ) were delivered from their servers.
Themepunch decided to change Slider Revolution ports support. The Magento versions (1 and 2), Joomla, PrestaShop and the other old ports wont supported anymore.
You still get the access to the templates up to version 6.6.7 and the Magento add-ons as they were. There will be no updates and no new templates.
Regards, NWDthemes team