Frederic,,
Not that I know of.
Have you tried uninstalling (via Windows) and reinstalling SC.7? Remember about the dongle being attached when reinstalling
Can you free trial an upgrade to SC+?
If no success, I would try a free trial of another CAM, but it does seem to be related to thge version of SC you are using.
I thought about giving you the download of the SC7 release I have but it is 448MB and CNCzone would not allow me to attach it. I may explore the option of FTP-ing it to you, if you are interested.
.
Bevin