I have used this successfully for a while, but the upgrade to Mavericks and 9.1 seems to have killed it. The auto-update became sporadic and then gave continual authentication errors. It did manage to complete a scan, but the progress window showed otherwise. All a bit flaky.
I decided to remove it with AppZapper and reinstall. The installer runs, but it quits with an "unable to install" message. What is the wisdom on this?
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