A new command `/pregen reset <world>` lets you restart pregeneration for a world without messing with files.
Bug Fixes
Fixed an issue where the pre-generation area was too small and didn’t cover what you asked for. User pointed out that when they use 10000b in the command they expect the radius to be 10000b from center outward not edge to edge, so now it is doubled to account for this.
Fixed extra messages showing up in the console when they weren’t needed. Chunker is smarter about when to show messages. It now only shows "already disabled" messages when a person runs the command, not when the system does it.
Fixed missing chunks at the edges of the pre-generated area. Chunker now rounds to nearest region if our command falls short to make sure generation is fully covered.