How do you use non smooth terrain editor?

So the terrain has been updated, and now supports smooth, however the edit menu has also been replaced. the old generator is gone, and all the other usefull tools. My older maps still have the non smooth terrain and the old tools. How would i convert from smooth back to "Blocky" (I have no terrain on the game at the moment, so losing it won't matter) (Or at least be able to use the old generator that has so many more options than the newer one.)