Until recently it was under AGPL. It was open sourced in 2022, and now siemens bought altair (the company who developed it for many years) and closed it again. Some of us cared and contributed, and now it’s gone… Maybe this can continue under another name using the last source release?
> Some of us cared and contributed
Under a CLA.
Looks like they've made https://github.com/OpenRadioss/OpenRadioss private to make that harder to do. But hopefully someone out there has a recent clone of the repo.