YTD Downloader malware
I downloaded a program called "YTD" off CNET to download videos from youtube. The program worked great, but I think it left behind some malware. All I've noticed is that it changed the search preference of all of my browsers to Yahoo, and it installed some add ons in the toolbar (ebay, amazon, etc.). Another weird thing I noticed is some text in the URL when I open a blank new tab. It used to remain blank but now a new tab opens with this typed out in the bar: "chrome-extension://icdlfehblmklkikfigmjhbmmpmkmpooj/newtab.html"
It's starting to really annoy me. What can I do to get rid of this? I already did a full scan with avast and nothing was found.
MacBook