If the file is not starting, you can try cancelling from download window & reselecting from search results. But only if the file has not started since cancelling downloads in LW 5 deletes the incomplete file also. Using this technique in LW 4 is fine however as it does not delete the incomplete file. Also right-click the search tab & choose get more results.

But keep an eye out on the file size, also make sure it shows a bit rate. Otherwise these files might be fakes, corrupt, viruses, etc. The more metadata id3 tag information they have, the more likely they are to be good files. eg: album, artist, year, bitrate, description/comments, etc.