I use Kwrite for looking at code. Sometimes I want to test the result of removing a line and Kwrite had a very useful menu option : "Toggle comment" (before there were 2 lines in that menu, "Comment" and 'Uncomment"). As I don't do that every day and as the syntax differs from language to language (and sometimes within the same language if you consider CSS to be a part of HTML), I can never remember how to do it.
I've just noticed that this menu option is missing from my current version of Kwrite (on an up-to-date Lubuntu).
How can I get it back? Should I try to install an older version of Kwrite?