and is this installed on a different PC ?
If you want PC and Laptop to talk, it is a windows network and shared folders that are required
If you want to open .MC8 files in X4
> File open
> Open the "Files of Type" pull down, and select the extension filter ( upper ones are mastercam formats, lower are possible convertors )
> Then use the "Look in" to navigate to your file location, be it a floppy, USB, or even a network drive
> ( double-click ) or Accept the selection