The standalone download should work now, but I'm glad to hear you already managed to fix the issue
Does than mean you want to get notified if the player is digging, or do you want to modify the terrain through the API? If you want to get an event, the PlayerDestroyTerrainEvent is probably what you're looking for
However, modifying the world through the API isn't possible yet, unfortunately that didn't make it into this update... but the World class will get some methods for that with one of the next updates
Sorry for late response. I meant it as in: Can i make a cube(or cow) dig holes in the ground, like players do? and what should I use for that?
I am asking to if its possible to make a plugin for a sandworm.