My idea is that in this thread we can discuss on software useful for but not limited to editing the pictures created with SP-Studio.
Currently I am looking for a vector-based software that is free or at least cheap and also has a free-hand drawing tool. Most programmes I know can create simple shapes that you then can manipulate. I even found one, namely Inkscape, where you have a free-hand eraser . But so far I couldn't find one that meets my demands.