I am using 10.1.5 and keep most of my library on a different hard disk. I had the same problem when I upgraded to LimeWire Pro 2.5.5, but on the earlier version I had no problem. My new version tends to spontaneously fix itself if I leave it alone for a while, but it still only shows 14 instead of 2700 shared files on startup. My slave drive is internal, though; you didn't specify about yours, so that might be the real difference.