Sorry I was wrong, it doesn't change the priority order ... well it does, it puts it at the bottom of the list if it's queued after you have reselected it from the downld results. Oh well. Best I could think of would be to Pause the others if it's really more important. You can pause queued files.
But searching for more sources can also jump it into actively downlding "sometimes". But remember, QUEUED means LW is too busy to handle the file. So after opening LW, let it settle before adding to the queue because all incomplete files will start as being queued when you 1st open LW. Also not downlding too many files at one time will also help prevent files queuing.