There are multiple releases of the database. Usually, you should use the latest release, unless you are trying to reproduce a previous analysis. You can download the entire database here or just a subset.
The database is a FASTA file with headers in the following format:
>name=Aphanomyces_invadans|strain=NJM9701|ncbi_acc=KX405005|ncbi_taxid=157072|oodb_id=13|taxonomy=cellular_organisms;Eukaryota;Stramenopiles;Oomycetes;Saprolegniales;Saprolegniaceae;Aphanomyces_invadans
The following fields are present: