Ok so, here's what a little discord digging told me:
1: devs became an indie group (this is getting rather common with "not crap tier" modders in Terraria at this point)
2: the mod was handed over and merged with Myth Mod, and was removed off the browser. So this mod (atleast as ER) is effectively dead.
3: I would advocate towards anyone who has the .tml file to share it around, but given the volatile nation of 1.4 TML and its updates, it won't really matter.
PS: their discord tracks users joining and leaving, and there's hostile messages towards people who join to try to download the mod... Pretty jerk behavior.