Adobe Photoshop Lightroom 5.2 (Final) is a performance-focused update released in September 2013 for the perpetual-license version of Lightroom
Added raw support for newer cameras of that era, such as the Canon EOS 70D and Casio Exilim EX-ZR800. Risks and Modern Alternatives
to the Detail Panel to help reduce low-frequency color mottling artifacts. Smart Preview Updates : The maximum size for Smart Previews was increased to 2560 pixels on the long edge. Local Adjustment Pins
Even if you find a “ChingLiu” copy on an old hard drive or archived torrent, consider:
Otherwise, I recommend downloading the official free trial or purchasing Lightroom from Adobe to ensure security (malware-free), updates, and support.