Why the heck did you post this in the windows Xolox forum???? That forum has nothng to do with either LW or mac! doh
Your post is highly confusing. If you're refering to the markers that indicate you've already dwnlded that file, then I'm not sure why you'd want to get rid of it. You can go to LW's menu Tools>Downloads & tick 'Autoclear completed dwnlds' & this will automatically remove your 100% dwnlded files from your dwnld list. Press apply button if you decide to use it.