Replace whole lines that contain a keyword.
Not a find-and-replace tool — a find-and-replace-the-whole-line tool.
Plenty of tools find a word and swap it for another word. Line Replacer is different: when it finds your keyword, it replaces the entire line the keyword is on — or deletes it outright.
Point Line Replacer at a text file. Tell it one or two keywords. Tell it what to replace matching lines with (empty string deletes the line, a space blanks it, any text substitutes that text). Press Start. Every matching line is rewritten in one pass.
49 small, sharp Windows utilities. All freeware. All by the same author.