Shutdown Add-in claims to do both... sort of. Its author states that it hooks
into events triggered by Outlook and invoking a series of commands to help Outlook exit. After a certain timeout period, if Outlook still doesn't exit, then the process is forcefully exited
Carol, you've forced me to look at something I hadn't given much thought to before. My reading of the above is that this is simply automating what Knockout does and what I do with TaskManager - looks for Outlook's process running and kills it if Outlook has been closed. I'm not sure how the events are hooked into and what commands are invoked to "help" Outlook close, but that is the functionality that I've always associated with Shutdown Add-in. I bought it years ago because I grew tired of finding six or more Outlook processes hogging my processor and RAM (with 128MB at the time) and killing them with TM... Realistically, if all Shutdown Add-in is doing is forcing Outlook to close, this might actually be causing PST corruption as I've no idea how often it's simply terminated Outlook over the years.
Bother.
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Welcome back and thank you! 
Nice find, Renegade - thanks for the morning chuckle! (6:50 am here).
I'll have to find a thinner felt tip and try again.