Installed directly from their site link I got to their site from what was linked on Wikipedia. I will note that there were additional applications which you could accept or decline to install when running it's installer, specifically what appeared to be an antivirus program I did not recognize... I think. I cannot quite remember what I saw, but I declined them whatever the case.
Also looking at those WoT ratings... One of the people who called it malicious also linked to a clearly malicious site. Could just be spam. And of course some people DO install good programs from non-legitimate sources, then blame the legitimate website. Also I installed it because it was mentioned by a friend, but I'm always questioning whether they know well enough to be careful of malicious programs anyway.
Edit: Also, searching for it brings up it's own Google plus profile. Probably fine, but I'm paranoid as usual. It didn't set off Comodo or Avast either.
Doing a little searching and I think the programs you opt out of may genuinely be malicious and the cause of complaints.