Any way to reset toutorial worlds?

[Tephlan]

I have never gotten the hang of the building tools and it looks like i've made such a mess on the prehistoric tutorial world that i think I've mistakenly destroyed one of the gold brick quests while completing another.
Is there any way to reset the prehistoric tutorial world without having to start completely from scratch with a new game?

on another note - I keep running into heavy lag specifically when I try to do the add landscape and create land bridge over lava flow gold brick quest. This has happened 4 times now - same spot.

[Mustytree64]

make a new save you get 4