this is a no brainer. Version 3.5 contains more useful functions and better overall functionality. It also contains an important fix for the problem of orders files corrupted that plagued versions 1.x and 2.x.
You don't see as much difference from the outside as when you look at the source code. It's just unbelievable, how much the script has changed (for better). It's like looking from orbit first at Mars and then at Earth, as I imagine it. The latter is so much better.
