Klpq is quite easy to use, so I just want to say some words about things that are not obvious:
If the Auto button is pressed down, Klpq rereads the current printqueue every "no" seconds, so you don't have to hit the Update. You may change the 'no' of seconds by selecting config->Auto update from the menu. If you set "no" to 0, then the Auto button will be completely disabled.
If you get the message This is a privileged command, than you have to be root or any other privileged user to execute this command and if you try to remove a printjob of another user, this is silently ignored.
There are several key accelerators defined: