You have the junk filter preferences set to default for the new installation. Go to Limewire>preferences>filters>junk and I suggest you dissable the filter to start with and you can set it up later if you decide to.
This is the portion of the Limewire faq dealing with the Junk filter
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Q: How does the Junk button work?
A: If you see a search result that is not relevant to your query or one that appears to be a virus of some sort, you can now mark it as Junk by selecting it and then clicking the "Junk" button. Over time, LimeWire learns which files are relevant and which ones are not. If a relevant file has been marked as Junk by the filter, then you can mark it as "Not Junk". When you feel confident that LimeWire has learned which files should be marked as junk, then you can instruct LimeWire to hide all junk results by going to Tools > Options > Filters > Junk.
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