Quad-core intel Xeon Mac on OS 10.9.5, running CWS 5.6 (to a Canon C1 Q2 v2.0 printer server)

Clicking to open software, but just hangs and then not opening at all.
Are they any known issues with 5.6 and Mavericks before I reinstall and install software to see if that works? Any suggestions?

Was working fine until yesterday, when I came to my screen to see it had quit unexpectedly and my Mac restarted...