Hello,
if you are not familiar with the tool, here's the initial post : https://steemit.com/downvotes/@howo/introducing-downvote-control-tool-an-open-source-downvote-tool
It's been about a week since proposal has started paying out. So it's about time for me to push the first update.
I will do one update every week to add new functionalities. So here we go with the first one !
Keychain support
Highly requested, so this is one of the first features to ship. I had to rewrite a big chunk of the app but it is now live ! You can now use keychain to login and do everything. I also kept the steemconnect login option as I felt that not everyone had keychain.
This is an important feature as many whales don't want to input their keys on a website but would rather use local tools like keychain.
Counter downvotes
This feature allows you to fight abusive downvotes with your upvotes. This is a very important feature as retaliation downvotes happen, and abusers rarely pick someone their own size, so this is a good way to make sure that they will stay put.
Be careful though, this feature still works with ratios (proper calculations based on $ per vote will come next week). So plan your ratios accordingly to not over compensate.
Whitelist
Add the people you don't want to automatically downvote on that list. It's useful if you want to counter the upvotes of an abuser but want to avoid hitting the wrong persons.
Don't downvote 100% to null or steem.dao
Thanks to a recent update. We can now easily set beneficiaries on steemit.com so we see more and more people selecting steem.dao or null at 100% and then promoting their post (a good example is dtube's recent announcement). So I've added logic to make sure not to waste voting power on it.
You can check all of those new features on https://downvotecontrol.com
If you like what I do please consider voting for our witness 
@howo