Surfcam doesn’t see solids, only surfaces and wireframe, even in the latest versions, so I’m not sure what they mean when they say “program from solids”.
The price seems ridiculous but doesn’t surprise me since you bought the 5 axis from a second party. Try to negotiate with them or try another dealer, I don’t think their dealers are tied to regional areas. It’s may be worth upgrading, even though Surfcam hasn’t changed much in 10 years. See if you can demo the latest version to see if it’s worth the upgrade.
If you’re one year behind on maintenance why are you still using Surfcam 2002? What were you getting for your maintenance fees?