"Proprietary software doesn't stop people modifying software, it only slows them down."
See DMCA and licensing agreements. Modifying your stuff might be a felony someday. Best to be sure the right to modify or repair is right there in the license. Irrevocably and transfering to next buyer automatically. Not happening right now.
See DMCA and licensing agreements. Modifying your stuff might be a felony someday. Best to be sure the right to modify or repair is right there in the license. Irrevocably and transfering to next buyer automatically. Not happening right now.