The mention of Joomla 2.5 is significant because Joomla 2.5 reached its end-of-life in December 2014. This means it no longer receives security updates or support from the Joomla project. Running a Joomla site on version 2.5 poses serious security risks.
If you've already installed a pirated RSForm Pro version, run these checks immediately: rsform pro 140 rev45 for joomla 25 free
Better yet: Scrub the installation entirely – download a fresh Joomla 2.5 package (only for temporary data extraction), migrate your content, and rebuild on a modern platform. The mention of Joomla 2
If you have a valid license from the past, you might still be able to access the legacy download area on the RSJoomla! website. Legitimate "free" downloads are only available to active subscribers. Better yet: Scrub the installation entirely – download
If you truly need a free form builder for Joomla 2.5:
Better approach: Upgrade Joomla to 4.x or 5.x and use the free RSForm! Free (limited but secure) or Convert Forms Free.