Alternative Silhouette software?

Is there any alternative software for the Silhouette?

Recently I've been having problems with the files I've designed in ROBO Master for QuicKutz software. My Silhouette isn't cutting the lines where they're supposed to be. Is there a better software for designing and cutting?

(I've contacted QK support about the problem, but they couldn't help..)

you can use the Designmaster software which you can buy direct from GraphtecGB

oh forgot the say - there is also Inkscape which is free, tons of tutoruals here for it too
www.inkscape.org

Thanks! :)