McAfee Cox Security Suite continually deactivating

My McAfee routinely deactivates itself.  I uninstall it (per support answers I've found in these forums), download the latest version, and install it.  It's fine for a month or so, and then I'll get a red exclamation point in the icon in the menu bar.  I launch the McAfee control panel and it tells me that it has been deactivated since 1/15/17.  Doing this every 4-6 weeks is getting old.  Is there a solution other than the cycle described above?

MacOS version 10.11.6

Thank you for your time,

Richard