You have to pause it first {PAUSE}, before being able {END} = abort, {HOME} = reload, and new function {INS} = Looter.
The Looter function is just what the name suggests, it is meant to test if it works. ie,
drop some items on the group, rares, blues, whites, legs, gems, then press INS and it will pick up items depending on what you have specified in the config.