Here's a new version (v2)! Solved the bonemeal crash, also solved the ReplacedBlocks issue and I believe island biomes should now work as they did in TC 2.6.3 (when using BeforeGroups mode). I've also added the /tc biome console command and added the /tc worldinfo command along with Author and Description fields in the WorldConfig. Also re-added the bonus chest button in the world creation screen.
And probably some other stuff I've already forgotten about ><. In any case, try it out!
In other news, new versions of MCW for 1.7.2 and 1.7.10 are pretty much done, fixed some minor bugs and crashes, just need to do more testing. There's more exciting news though, MCW for MC1.8.9 is almost done, looks like only the pre-generator is still causing problems.
*Edit: Haven't looked at saplings from BO3's yet.
*Edit2: To anyone talking to me who I haven't responded to yet. Sorry, lil busy atm, working on several new releases, will be done soon.
*Edit3: Dang, I added the "WorldSeed" setting to the WorldConfig but I forgot to make the world creation screen automatically fetch the value.