Naming
I think a more precise naming than "Tagged file list must be cleared" should be found. Also, the naming should fit to the naming used in the menu "View > Tag > Clear all tags.
BTW: Is it "naming" or "wording" or "labeling"? Hmm...
Events
Currently the setting "Tagged file list must be cleared" can have the values:
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After an operation
After change folder
On Exit
Never
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Currently I'm not clear what the value "After an operation" will do. I've tagged some files and created a file list (=operation?), but the files remained tagged.

Perhaps a better, more consistent wording:
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After an operation ???
On folder change
On program exit
Never
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