I would take the time to contact NWA via phone and register your machine as the 'new' owner. I'm not sure their automated system will support this.
You will find the NWA control software download here -
https://www.nextwaveautomation.com/downloads-links. As I'm not familiar with your model machine I'm not sure you will need it or not.
I would go to the Vectric site -
https://www.vectric.com/ - and send an email to support with your Vectric product code explaining that you purchased this from previous owner and go from there. They may be able to provide a download link to that version of VCarve. You might also try finding a friend with a disc drive and transferring to a thumb drive.
Good luck!