I have this same problem, but it was because CorelDraw wasn't shut properly.
Try this:
Close both Corel and Cutting Master, then go to the task manager (Ctrl-Shift-Del) and look in the Processes Tab and see if Corel isn't still running, if so, End Process of Corel.
Then re-open Corel and Cutting Master and try again.
This works for me.