I have some problems to program. The error is:

In file included from LCDemo7Segment.pde:2:0:
C:\Users\Agnes\Documents\Arduino\libraries\LedControl/LedControl.h:24:24: fatal error: WConstants.h: No such file or directory
#include <WConstants.h>
compilation terminated.
Error compilant.

You need a newer library. That is obsolete. But if you insist, change it to Arduino.h.

Okey. Where I can trouble a newer library?