I have version 6.0.1186, but can't remember whether or not I had that version before I clicked the popup notification on my desktop. Since that version was released on March 25, 2015, I'm wondering if this was an error or if it was a fake hiding a virus.
On April 24, I noticed a message from SuperAntiSpyware about a new version being available. But when I clicked it, it said no updates were available! Was this some sort of error? I ran several scans afterward, but found no indication of any virus or malware.