This specific version (v2.7.1) was released around 2014–2015 and introduced several critical features:
Traktor Pro 2 is a professional DJ software developed by Native Instruments. For many years, it was the industry standard alongside Serato Scratch Live. Version 2.7.1 represents a mature point in the software's lifecycle, offering stability and a specific feature set favored by "controllerist" DJs.
You mentioned "incl patch r2r" in your query. Here is what those terms mean in this context: