NotePad++
Everyone involved in litigation support needs a powerful text editor, and you can get a very good one called NotePad++ for free at https://notepad-plus-plus.org/. If you have been finding and replacing data in Excel, Word, or Microsoft's standard NotePad, you'll greatly appreciate the speed at which NotePad++ can process text.
My favorite feature in NotePad++ is the ability to run Regex searches when finding and replacing strings. You can search for patterns such a five digit file number (File: [0-9][0-9][0-9][0-9][0-9]) or remove strings that appear within a certain number of words of each other (\b(word1|word2|word3)(?:\W+\w+){1,6}?\W+(word1|word2|word3)\b).