On the FastUnifrac webside available at the begining of the year I was able to obtain p-values having

 “unifrac_env.txt”file, 

  GreenGene Core as the reference tree 

   and  “Automatically generate category mapping file” option was previously available.

Can I have access to the previous website, rather than the new galaxy? or how can i have the option of "automatically generate catergory file" ?