I seem to be infected with hanstrackr.com, a highjack/redirect virus.
Before I attempted to start a scan with RK, I ran Malwarebites Premium which had blocked hanstrackr, posting a notification window in the lower right corner. It detected nothing when I ran a scan. So I uninstalled Malwarebytes with BCInstaller.
I tried to run Rogue Killer Premium, got an update available. When I clicked run, an icon appeared on the progress bar that looked nothing like the Rogue Killer logo. I canceled the installation before it completed. Is the update legitimate, or not? I can't determine which.