ItemRack 2.16 (Old version don't download) 

Yeah it's not a true checkbox, click it a few times you'll see it has three states (ignore, show, hide). If you want *all* helms hidden then you need do nothing other than make sure it's off in the game's interface options as usual.

It becomes a pain when you want maybe 1-2 shown and the rest hidden. I have a monocle, santa's hat and couple resist hats (like iceguard) that are too hilarious to hide, but it was a pain going through all 15-20 sets and putting an X beside them all.

I'll likely add a per-item setting instead of per set in a button in the options scroll. So you can say I want all helms hidden, these are exceptions.

But as I said that's a low priority for now.

2.0 was a complete-from-scratch rewrite, partly in response to a rewrite of TrinketMenu that I was very happy with, and because of the big changes for BC. When it came time to do events there were several things at once: 1) I wanted to do them differently, the old script method was clunky and required much more maintenance/lua knowledge than it should, 2) the mod was complete enough to post as is without events, 3) the set equip method wasn't durable enough to handle multiple simultaneous swaps (it is now), 4) BC released and I dropped modding to level and kinda procrastinated to get back to modding.

That said, I'm confident the next update will be 2.2 with events unless some emergency bug pops up.

Yeah that's very likely, tho it would be ideal if the existing itemrackfu were made to work with it. That's on the short list for 2.3, along with titan panel and buttonfacade support (and unique-equipped gems I haven't forgotten about)