I've just added in config versioning as I'll regularly be adding changes and additions to the config so to keep track of it and to make sure nothing breaks when the version changes it'll automatically update your config to the latest version.
Currently this wipes your config but in the future I'll possibly make it an updater rather than a reset

I've also added the config option:
wetSpongeRequired which when set to true will only remove lava when a wet sponge is used and a normal sponge won't be able to remove lava

more updates soon!