I wonder what the reasoning for open sourcing it now. And why not from the get go instead of decades later. Licence choices are obviously up to the authors. But at this point it is more a museum relic than anything practical
The rights to L0phtCrack were purchased about a year ago by a company that made password cracking rigs for large companies to audit their employees passwords. They filed bankruptcy due to the GPU shortage changing their COGS overnight. When payments stopped being made the license reverted back to the author and he open sourced it.