Three times now I've run into a sprite that doesn't update correctly and instead of moving it paints itself (and leaves a permanent copy of itself) and happened towards what I could fit in using the free version. I've considered buying the program so before I spend money I need to know the limits of the program and if I can use it well enough. And a few times now the sprites start acting crazy ie copying themselves all over the layout, painting their shape permanently wherever they move ect. Is this a bug or a result of using the free version?