KLS Backup Professional is a powerful backup and synchronization software designed for Windows 11, 10, 8, 7, and Windows Server 2022/2019/2016/2012. The 2023 release (12.0.3.0 x64) represents a mature, stable build optimized for 64-bit systems, enabling it to handle large volumes of data, open files, and complex backup routines without the memory limitations of 32-bit counterparts.

: This version notably improved encryption in "each file" mode, increasing the master key iterations to 1 million for greater resistance against brute-force attacks.