The version you're interested in is v5.0.2, which is a specific build of Studio One 5 Professional. The "R2R" suffix likely indicates that this is a cracked or pirated version of the software, which has been modified to bypass licensing restrictions.
You're looking for information on Studio One 5 Professional v5.0.2 R2R! studio one 5 professional v5.0.2 r2r
If you're interested in using Studio One 5 Professional, I recommend purchasing a legitimate license from the official PreSonus website or an authorized dealer. The version you're interested in is v5