Hey :)
We’re working on it daily and will release it once its done. We cannot give a accurate ETA yet, and the update is not just an addition of a page builder, but much much more so its very involved and time consuming. Lots of great stuff coming! You can stay up to date by following the 4.0 news thread on our forum, that where be where we post the most info including release dates once we get closer.
Thanks!