Good to see they are staying on top of Amulet. Minecraft REALLY needs this!

You're in luck... kind of, since there is a successor currently being developed: the Amulet Editor, although currently, from what I know about, it's still in testing and only the bare necessities are added, so it's far from being entirely user-friendly in its current state.

In the meantime, if you have Forge (or Fabric), I suggest that you should try and use WorldEdit since, despite it being difficult to use, it can be very powerful.