This update includes support to WorldGuard, which means that you can now use the flag "cropclick" as a kind of rule. If you add this flag on "deny" in a region then it will disable all events that would have triggered from cropclick.
If you only want some people to be able to click a crop then you can have the flag "cropclick" as "deny" and then either add a member/owner to make them able to use events in the area.
If you want the plugin to work as usual you don't need to worry about this update that much. And if you want to give access to everyone to use events in a region then you either set the flag to "none" or "allow".