look at the screenshot
then replace this
//------------------------->DRAW ARTIST THUMBNAILS
$puts(gp.art.T,6)
$puts(gp.art.size,$sub($mul(%el_group_row%,%el_row_height%),12))
$puts(gp.art.L,$sub(%el_width%,%BG.E.RIGHT%,$get(gp.art.size),3))
$drawrect($sub($get(gp.art.L),3),$sub($get(gp.art.T),3),$add($get(gp.art.size),6),$add($get(gp.art.size),6),,$get(Hline.color),)
$albumart($get(gp.art.L),$get(gp.art.T),$get(gp.art.size),$get(gp.art.size),1,artist $get(aspect.op),,,)
by this
//------------------------->DRAW ARTIST THUMBNAILS
$puts(gp.art.T,6)
$puts(gp.art.H,$sub($mul(%el_group_row%,%el_row_height%),12))
$puts(gp.art.W,$mul($get(gp.art.H),1))
$puts(gp.art.L,$sub(%el_width%,%BG.E.RIGHT%,$get(gp.art.W),3))
$drawrect($sub($get(gp.art.L),3),$sub($get(gp.art.T),3),$add($get(gp.art.W),6),$add($get(gp.art.H),6),,$get(Hline.color),)
$albumart($get(gp.art.L),$get(gp.art.T),$get(gp.art.W),$get(gp.art.H),0,artist $get(aspect.op),,,)
You also will notice if you mind to read the note in the zip, that you miss some icon/functionality/font. (red circles and ellipse).