License keys which start with CHBB or CEBB are for Cubism 2 Editor PRO and cannot be used with the latest version of Cubism.

Cubism 2 Editor can be downloaded from the following page.
https://sites.google.com/cybernoids.jp/cubism-editor2-e/editor-2-1/download

If you want to use the latest version of Cubism Editor PRO, please purchase a subscription plan.
https://store.live2d.com/en/