ok, this answers my question before.
So you have the Supertype! Cool!
The Supertype has a small profile therefore it is not so easy to turn on its back. The only technique I know is swimming towards it. The more you grab into the depower lines the better you can turn it, but watch the lines so they don't wrap around you and the kite doesn't get power while your hands are wrapped with lines!
Just try to practice and you will improve your technique. And, don't worry, since you will drop it less and less. Always have in your mind where the kite is and where it is flying to. So after a bad jump you have to steer it the way so it doesn't drop. practice, practice, practice!