Personally, I removed the older version I had, fearing it would auto upgrade and auto install malware.

It's a download manager for shared hosting sites, mostly used for downloading movies/shows/games. It can get videos from youtube, dailymotion and a hundred sites but it's not the main purpose. Users are willing to try anything to get their latest tv show, there is too much money in bundling adware to ignore. The software was great once upon a time, then it got popular, eventually the author sold out.