I am sorry that you are having issues with Cubasis.
If you are interested in supporting the development of the app, could you give us more information about the crashes that you mentioned? In what circumstances did they occur? Are you able to reproduce them? Can you try to get hold of the crash logs (see Steinberg Forums for a how-to)?
If we have good information about an issue in the app, we are usually able to fix them quickly (i.e., in the next release).