If you want to use the software safely, your best options are through : Lightroom Classic - Adobe Security Bulletin
Q: Is Adobe Photoshop Lightroom Classic CC 2018 free? A: No, Adobe Photoshop Lightroom Classic CC 2018 is not free. However, you can download a free trial version from Adobe's website. If you want to use the software safely,
If you have an active Adobe Creative Cloud subscription, you can install older versions of Lightroom Classic directly through the desktop app: If you want to use the software safely,