Have you paid for it yet? If not, seriously, get a different cam package.
Edgecam is powerful, yet incredibly frustrating, difficult to use, unstable, poorly supported and has the worst training and help literature i've seen on any software ever.
Once you 'get' it, it's ...not bad. But why go through that pain?
If all you do is engraving, I have to recomend millwrite. Cheap, easy to use, specificly meant for engraving work and it's and rock solid.