After a user prompted me about this, I realized this program can access more than one type of danbooru style site. Examples include gelbooru, sankakucomplex, 3d booru, etc.

Check in the list.pl file for a list of stuff that is supported. You should see something like this.

gelbooru=>sub{
use Booru::Gel;
Booru::Gel->new();
},

The bolded text is what you type in when you choose the type of booru to use. So it would look something like this.

perl booru.pl gelbooru ibuki_fuuko -r=3 -f=${md5} -p="C:\Pictures\Fuuko"

If the site you want is not there, you can probably edit the file/url to make it appear as long as you know the code or whatever that its written for.

I wish there was a post without bumping option.