Really, don't use Techne. It hasn't been updated in nearly a decade so almost none of the code it generates is usable by MCreator. I would highly recommend Tabula, though. It's made be look and operate just like MCreator but is (reasonably) up-to-date with modern features and code generation that MCreator can actually use. People seem to absolutely adore Blockbench but I just don't see the appeal. It sacrifices far too much functionality and ease-of-use for the sake of looking cleaner.
Techne is broken now, I mean, you can still make models with it, but when you'll load Minecraft, it will directly crash.
Really, don't use Techne. It hasn't been updated in nearly a decade so almost none of the code it generates is usable by MCreator. I would highly recommend Tabula, though. It's made be look and operate just like MCreator but is (reasonably) up-to-date with modern features and code generation that MCreator can actually use. People seem to absolutely adore Blockbench but I just don't see the appeal. It sacrifices far too much functionality and ease-of-use for the sake of looking cleaner.