I'm sure you can shorten these parts quite a bit:

on *:dialog:Auto-Identifier:sclick:11:{
  var %i = 1
  while (%i <= 10) {
    if ($did( $+ %i $+ ).edited) {
      hadd -m settings $replace($replace(%i,1,nick1,2,password1,$&
        3,nick2,4,password2,5,nick3,6,password3,7,nick4,8,$&
        password4,9,nick5),nick10,password5) $did( $+ %i $+ )
      inc %i
    }
  }
  if ($did(15).state == 0) {
    hdel -w settings nick*
    hdel -w settings password*
  }
}

on *:dialog:Auto-Identifier:init:0:{
  did -c $dname
  var %i = 1
  while (%i <= 10) {
    did -a $dname %i $hget(settings,$replace($replace(%i,1,$&
      nick1,2,password1,3,nick2,4,password2,5,nick3,6,password3,7,$&
      nick4,8,password4,9,nick5),nick10,password5))
    inc %i
  }
  if ($hget(Settings,Auto-Identify)) {
    did -m $dname 1,2,3,4,5,6,7,8,9,10
  }
}