A version of software is a modified executable that bypasses licensing checks. In the case of KSuite 270:

: Improved stability and reduced "grayed out" protocols that were common in earlier software builds. Common Installation Requirements

provide the latest legal versions (currently v3.0+), patched legacy versions like 2.70 are typically found on automotive tuning forums such as Grand Tuning Forum or through the OBDExpress Blog

Guide to KSuite 2.70 Download: Optimization and Patched Software for KESS V2