if you just want to Download all the bacterial proteins from NCBI you could use Entrez Direct: Click Here Here is some small example which could do the job (restricted to refseq)
esearch -db protein -query "bacteria [ORGN] AND refseq [filter]" | efetch -format fasta > bacterial_proteins
See this post and my answer inside:
NCBI structure has been changed, so I am not sure about recent archives.
But to find at least something see ftp://ftp.ncbi.nlm.nih.gov/genomes/archive/old_refseq/Bacteria/
and all.faa.tar.gz file. I don't know where to find a current version. The old one is from 02.06.2015..