Some time ago and before Vitruvius engine passed to comercial circulated in the internet various links to download beta/test versions.
This link brings together three versions : 0.82b , 0.83b and 0.84b.

Code:

https://mega.nz/#!UxUG2arb!VW8Ve1Rcfdu3lRTheEZLD9qXaYYUmBI9DNnllka1Sc8