Oh hai. This took a while! We had to update every third party library (including physics, etc.) due to a new 64-bit requirement by the App Store. Fortunately it's almost done; we just need to update a bit more code on the iOS version and we can start shipping updates again.
In the meantime, if our dear Mac users could bang on this build and post any NEW issues here (e.g., something messed up compared to v2.3.4), that would be fantastic. (There should be nothing new in this build - it's just a compatibility update. Shiny new things will come next.)