I can't see that being a big issue the AVX2 help files either have _avx2 names or are in a different sub directory.
The main software must already know if it is running AVX2 code or not so can change the path to the help files.
However I don't know anything about AVX2 - if it is just vector commands I don't know why different help files would be needed. I am going to investigate more today .
John Z
P.S. Would be nice to have a timer or tick counter in the bottom status bar to see how long each transformation takes.
I ran each version regular, SSE, AVX hard to tell performance difference. Later will try running two at once.
Very informative that you've got three four different instruction sets going