Version 1.5 is a free upgrade, and lets you limit selections to layers active at the current time by ctrl/cmd-clicking. This is really useful for things like grabbing all the text currently on screen, or, inverted (ctrl/cmd+shift-click), for shying or turning off all the layers you’re not currently working on.
In less-visible updates, the script has also been rewritten from the ground up. 1.5 is made from faster, much more compact code. (Seriously, this thing is like a third as long as it used to be.) It should play a little bit nicer with giant comps.