Version 1.0.3 is now available through the updater.
The main change is that you're now able to check for multiple item quantities in a single checkItemMoreThan event. To do this, simply follow this syntax:
This player must have at least 10 wood, 15 feathers, and 5 iron to make iron arrows, which is activated by the onSufficientItem event
onActivate > Self > checkItemMoreThan ["wood, 10, feathers, 15, iron, 5"] []
onSufficientItem > client > addRPGItem ["Iron Arrows"] [15]
onSufficientItem > client > addRPGItem ["wood"] [-10]
...
onInsufficientItem > client > centerPrint ["You need at least 10 wood, 15 feathers, and 5 iron to make iron arrows."] [5]
I'll update the section on the OP later.