Beginner Questions: fastled.h says: 3.001.007, yet Doxy pages say 3.1.

Beginner Questions:
fastled.h says: 3.001.007, yet Doxy pages say 3.1.
Do I have the wrong version?
Speaking of Doxy, the search function fails. I’m working through examples and looking up functions on the Doxygen pages.
I wanted to look up HeatColor and in the search area, I made sure that “all” was selected, typed in heatcolor and it says no matches.
But I then found it by text searching my library/fastled directory, finding the files, and then finding them by navigating thru Doxy.
So, am I doing it wrong? Does Doxy suck? Something in-between???

@Stuart_Sands use this link https://github.com/FastLED/FastLED