If you are prompted for a code, check these three primary sources:

The software may eventually be retired, but the standard of care it established continues to define modern dentistry. technical steps to retrieve a lost code, or would you like a comparison guide between Ez3D Plus and the newer Ez3D-i?

If the trial expires and you cannot afford the license, consider open-source alternatives like with CAD add-ons or FreeCAD , but be warned—they lack dental-specific workflows.