No, I couldn't quit the crash by any combination of keys. Neither using a lower configuration for the monitor.
At last, I thought of starting SaX2 on konsole mode. That way it didn't crash and I have solved the problem. It works perfectly now.
Thanks to all who have helped me.
(Now the only problem in my linux is the network problem, I have no internet connection. If you are so kind... can you go to the Network forum and help me with that?