Fire up Chromium and click on that three-striped button on the right corner.
A menu will open, click on “Settings“.
A new tab will open, go to it and click on “Extensions” (there is no need to log into Chromium!).
This screen will open, click on “Options“.
You’ll see that you are not subscribed to a filter, this why Adblock Plus isn’t working (anymore). Click on “Add filter subscription“.
“EasyList (English)” should be pre-selected, if not select it from the dropdown menu, click on “Add“.
It will, hopefully, take a couple of seconds to download EasyList, when it is downloaded you’ll see this.
(Remember, you can always do the cliccie for a larger piccie!)