Realtyna RPL, All versions, SQL Injection and abandonware

The developer no longer supports Joomla! The site is still online, but there are redirects to the Wordpress version. We asked the developer about the prospect of a security release, and received this reply:

It’s almost 2 years that we announced that RPL based on Joomla has been discontinued and we continued security upgrades for 1 year.

We take that as a "no".