I have found and successfully used edit strings found in Support Forum that delete a parenthetical expression (and its contents) from a file tag field (e.g. Title: "(I Can't Get No) Satisfaction" becomes "Satisfaction"). However, I have not found any suggestion that would just remove the parentheses and extra space, leaving the text between the former () in place (e.g. Title: "(I Can't Get No) Satisfaction" becomes "I Can't Get No Satisfaction").
Suggestions welcome, please! Also, thanks to the authors of the helpful suggestions cited above.