Make sure your computer meets the system requirements for the software.
Because V6 is no longer the current flagship, it isn't front-and-center on the main site. You can find it tucked away in the Carbide 3D Older Downloads section. Download Carbide Create, Motion & CNC Software carbide create v6 download top
Yes. Carbide Create V7 imports .c2d files from V6 without issue. However, V7 cannot save back to V6 format. Make sure your computer meets the system requirements