Which version of StatsThroughSkills should I use?

What is the difference between version 1,2,3 and 4?

Which version is the best to use and why?
Will these cause issues with NPCs?

The one that comes with the game has gotten many improvements and is quite good. You can adjust stats in character creation and they are not changed, stats are calculated at skill gain and not sleep and the stat gain has been recalculated.