sha256sum kelvenbox-1.0.0-linux-amd64.tar.gz
Because the primary development team has moved on to later versions, official support for 1.0 is limited. However, a dedicated community of retro-tech and FOSS enthusiasts maintains: kelvenbox version 1.0 download
(Note: Be wary of third-party download sites, as they may bundle the software with malware or adware.) sha256sum kelvenbox-1