The download issue with AdwCleaner was not on your end. Apparently, the author's site in France was down. I posted an alternate link.
BTW, malware removal sites recommend running AdwCleaner even after you've manually removed the specific program and browser addons you mentioned in your email. Depending on how the adaware/malware was packaged in another app, its possible that it can return by downloading and re-installing itself. The last thing I'm guessing you want? Apps like AdwCleaner can scan for such rogue installer programs. You may also want to follow up with
Junkware Removal Tool, also a portable app that doesn't require install. A final scan with Malwarebytes Free also wouldn't hurt.