Ah .. you mean like in LW 4 how you could clear inactive downloads. That function is not available in LW 5.
The LW 5.2 Beta does allow you to select multiple downloads via using the SHIFT key & either pause or cancel them; LimeWire 5.2.6 (Beta) - Lime Wire

The Autoclear option we were referring to in the above posts only works when the files are 100% downloaded.