This is alittle dialog that will give you an organized way of deleting files in your mIRC folder

dialog mc {
  title "mIRC Cleaner"
  size 100 100 200 112
  option dbu
  tab "#1" 1,1 1 43 110
  tab "#2" 2
  box "File Types:" 3,2 17 40 90, tab 1
  check "*.mrc" 4,8 24 30 10, tab 1
  check "*.ini" 5,8 33 30 10, tab 1
  check "*.txt" 6,8 42 30 10, tab 1
  check "*.log" 7,8 51 30 10, tab 1
  check "*.doc" 8,8 59 30 10, tab 1
  check "*.dat" 9,8 69 30 10, tab 1
  check "*.hsh" 10,8 78 30 10, tab 1
  check "*.dll" 11,8 87 30 10, tab 1
  check "*.htm" 12,8 96 30 10, tab 1
  box "File Types:" 13,2 17 40 90, tab 2
  check "*.jpg" 14,8 24 30 10, tab 2
  check "*.gif" 15,8 33 30 10, tab 2
  check "*.png" 16,8 42 30 10, tab 2
  check "*.mp3" 17,8 51 30 10, tab 2
  check "*.wma" 18,8 59 30 10, tab 2
  check "*.bmp" 19,8 69 30 10, tab 2
  check "*.pdf" 20,8 78 30 10, tab 2
  check "*.rar" 21,8 87 30 10, tab 2
  check "*.zip" 22,8 96 30 10, tab 2
  list 23,46 10 150 90, multsel vsbar hsbar
  button "Analyze" 24,46 99 50 10
  button "Clean Selected" 25,126 99 70 10
}
on *:dialog:mc:*:*: {
  if ($devent == init) {
    did -b mc 25
  }
  elseif ($devent == sclick) {
    if ($did == 23) {
      if (!$read(del.txt,w,$did(23).seltext)) { write del.txt $did(23).seltext }
      else { var %tmp $read(del.txt,w,$did(23).seltext) | write -dl $+ $readn del.txt }
    }
    elseif ($did == 24) {
      if ($isfile(del.txt)) { .remove -b del.txt | goto scan }
      else { goto scan }
      :scan
      did -b mc 25
      did -r mc 23
      if ($did(4).state) { echo -q $findfile($mircdir,*.mrc,0,did -a mc 23 $1-) }
      if ($did(5).state) { echo -q $findfile($mircdir,*.ini,0,did -a mc 23 $1-) }
      if ($did(6).state) { echo -q $findfile($mircdir,*.txt,0,did -a mc 23 $1-) }
      if ($did(7).state) { echo -q $findfile($mircdir,*.log,0,did -a mc 23 $1-) }
      if ($did(8).state) { echo -q $findfile($mircdir,*.doc,0,did -a mc 23 $1-) }
      if ($did(9).state) { echo -q $findfile($mircdir,*.dat,0,did -a mc 23 $1-) }
      if ($did(10).state) { echo -q $findfile($mircdir,*.hsh,0,did -a mc 23 $1-) }
      if ($did(11).state) { echo -q $findfile($mircdir,*.dll,0,did -a mc 23 $1-) }
      if ($did(12).state) { echo -q $findfile($mircdir,*.htm,0,did -a mc 23 $1-) }
      if ($did(14).state) { echo -q $findfile($mircdir,*.jpg,0,did -a mc 23 $1-) }
      if ($did(15).state) { echo -q $findfile($mircdir,*.gif,0,did -a mc 23 $1-) }
      if ($did(16).state) { echo -q $findfile($mircdir,*.png,0,did -a mc 23 $1-) }
      if ($did(17).state) { echo -q $findfile($mircdir,*.mp3,0,did -a mc 23 $1-) }
      if ($did(18).state) { echo -q $findfile($mircdir,*.wma,0,did -a mc 23 $1-) }
      if ($did(19).state) { echo -q $findfile($mircdir,*.bmp,0,did -a mc 23 $1-) }
      if ($did(20).state) { echo -q $findfile($mircdir,*.pdf,0,did -a mc 23 $1-) }
      if ($did(21).state) { echo -q $findfile($mircdir,*.rar,0,did -a mc 23 $1-) }
      if ($did(20).state) { echo -q $findfile($mircdir,*.zip,0,did -a mc 23 $1-) }
      did -e mc 25
    }
    elseif ($did == 25) {
      did -b mc 25
      var %x 1
      while (%x <= $lines(del.txt)) {
        if ($script($read(del.txt,%x))) {
          did -d mc 23 $didwm(mc,23,$read(del.txt,%x))
          .unload -rs $nopath($read(del.txt,3))
          .remove -b $remove($read(del.txt,%x),$mircdir)
        }
        else {
          echo $remove($read(del.txt,%x),$mircdir)
          remove -b $remove($read(del.txt,%x),$mircdir)
          did -d mc 23 $didwm(mc,23,$read(del.txt,%x))
        }
        inc %x
      }
      .remove -b del.txt
    }
  }
  elseif ($devent == rclick) { if ($did == 23) { run $did(mc,23).seltext } }
  elseif ($devent == close) { if ($isfile(del.txt)) { .remove -b del.txt } }
}
menu * {
  -
  mIRC Cleaner { dialog -m mc mc }
  -
}